부산대학교 도서관

Joundi RA; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Smith EE; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Mandzia J; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Ganesh A; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Menon BK; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Rempel JL; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Thornton J; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Roy D; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Jovin TG; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Dowlatshahi D; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Frei DF; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Bharatha A; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Poppe A; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Silver FL; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Shuaib A; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Teitelbaum JS; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Williams D; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Bang OY; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Sapkota BL; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Burns P; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Choe H; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Heo JH; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Kelly ME; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Linares G; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Shankar JJ; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Sohn SI; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Swartz RH; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Barber P; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Coutts SB; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Demchuk A; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Goyal M; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.; Hill MD; From the Division of Neurology (R.A.J.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton, Ontario; Department of Clinical Neurosciences (E.E.S., B.K.M., A.G., P. Barber, S.B.C., A.D., M.G., M.D.H.), Hotchkiss Brain Institute, Departments of Radiology (E.E.S., B.K.M., A.G., A.D., M.G., M.D.H.), and Medicine (M.D.H.), Cumming School of Medicine, and Department of Community Health Sciences (E.E.S., B.K.M., A.G., M.D.H.), University of Calgary, Alberta; Department of Clinical Neurological Sciences (J.M.), Western University and London Health Sciences Center, Ontario; Departments of Radiology (J.L.R.), and Medicine (Neurology) (A.S.), University of Alberta Hospital, Edmonton, Canada; Department of Radiology (J.T.), Beaumont Hospital, Dublin, Ireland; Department of Radiology (D.R.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec, Canada; Department of Neurology (T.G.J.), Cooper University Health Care, Camden, NJ; Department of Medicine (Neurology) (D.D.), University of Ottawa, Ottawa Hospital, Ontario, Canada; Radiology Imaging Associates (D.F.F.), Swedish Medical Centre, Englewood, CO; Division of Neurology (F.L.S.), Department of Medicine and Department of Radiology (A.B.), University of Toronto, St. Michael's Hospital, Ontario; Department of Neurosciences (A.P.), Université de Montréal, Centre Hospitalier de l'Université de Montréal (CHUM), Québec; Department of Neurology (J.S.T.), Montreal Neurological Institute, Québec, Canada; Department of Neurology (D.W.), Royal College of Surgeons Ireland, Beaumont Hospital, Dublin; Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Providence Neurological Specialties (B.L.S.), Providence Health Care, Portland, OR; Department of Neuroradiology (P. Burns), Royal Victoria Hospital, Belfast, United Kingdom; Department of Neuroradiology (H.C.), Community Regional Medical Centre, Fresno, CA; Department of Neurology (J.-H.H.), Severance Medical Centre, Yonsei University, Seoul, South Korea; Department of Surgery (Neurosurgery) (M.E.K.), University of Saskatoon, Royal Saskatoon Hospital, Saskatchewan, Canada; St. Louis University (G.L.), Souers Stroke Institute, MO; Department of Radiology (J.J.S.), University of Manitoba, Health Sciences Centre, Winnipeg, Canada; Department of Neurology (S.-I.S.), Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, South Korea; and Department of Medicine (Neurology) (R.H.S.), University of Toronto, Sunnybrook Health Sciences Centre, Ontario, Canada.

Publisher: Lippincott Williams & Wilkins Country of Publication: United States NLM ID: 0401060 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1526-632X (Electronic) Linking ISSN: 00283878 NLM ISO Abbreviation: Neurology Subsets: MEDLINE

Nguyen TN; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Nogueira RG; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Qureshi MM; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Nagel S; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Raymond J; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Abdalkader M; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Demeestere J; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Marto JP; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Sheth SA; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Puetz V; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Dusart A; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Michel P; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Ribo M; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Zaidat OO; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Siegler JE; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Haussen DC; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Strbian D; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Henon H; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Mohammaden MH; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Möhlenbruch MA; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Olive-Gadea M; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Puri AS; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Winzer S; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Kaesmacher J; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Klein P; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Tomppo L; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Caparros F; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Ramos JN; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Jumaa MA; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Zaidi SF; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Martinez-Majander N; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Nannoni S; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Vandewalle L; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Bellante F; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Farooqui M; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Salazar-Marioni S; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Virtanen P; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Kaiser DPO; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Wouters A; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Ventura R; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Jesser J; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Mujanovic A; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Shu L; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Castonguay AC; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Mansoor Z; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Qiu Z; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Masoud HE; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Requena M; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Peltola E; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Hu W; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Lin E; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Tanaka K; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Cordonnier C; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Roy D; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Yaghi S; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Strambo D; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Yamagami H; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Fischer U; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Jovin TG; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Lemmens R; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Ringleb PA; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.; Ortega-Gutierrez S; From the Department of Neurology (T.N.N., P.K., Z.M.), and Department of Radiology (T.N.N., M.M.Q., M.A., P.K., Z.M.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, MA; Department of Neurology (R.G.N.), Neurosurgery, University of Pittsburgh Medical Center, PA; Department of Radiation Oncology (M.M.Q.), Boston Medical Center, MA; Department of Neurology (S. Nagel), Klinikum Ludwigshafen, Ludwigshafen, Germany; Department of Neurology (S. Nagel, P.A.R.), Heidelberg University Hospital, Germany; Interventional Neuroradiology Laboratory (J.R., D.R.), Department of Radiology, Centre Hospitalier de l'Universite de Montreal, Quebec, Canada; Department of Neurology (J.D., L.V., A.W., R.L.), UZ Leuven; Laboratory for Neurobiology (J.D., L.V., A.W., R.L.), KU Leuven, Belgium; Department of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (S.A.S., S.S.-M.), UTHealth McGovern Medical School, Houston, TX; Department of Neurology (V.P., S.W.), and Dresden Neurovascular Center (V.P., S.W., D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (A.D., F.B.), Hôpital Civil Marie Curie, Charleroi, Belgium; Department of Neurology (P.M., D. Strambo), Lausanne University Hospital and University of Lausanne, Switzerland; Department of Neurology (M. Ribo, M.O.-G., M. Requena), Hospital Vall d'Hebron, Barcelona, Spain; Neuroscience and Stroke Program (O.O.Z., E.L.), Bon Secours Mercy Health St. Vincent Hospital, Toledo, OH; Department of Neurology (J.E.S.), University of Chicago, IL; Department of Neurology (D.C.H., M.H.M.), Grady Memorial Hospital, Atlanta, GA; Department of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, University of Helsinki, Finland; Department of Neurology (H.H., F.C., C.C.), Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France; Department of Radiology (M.A.M., J.J.), Heidelberg University Hospital, Germany; Division of Interventional Neuroradiology (A.S.P.), University of Massachusetts Memorial Medical Center, Worcester; Department of Diagnostic and Interventional Neuroradiology (J.K., A.M.), University Hospital Bern, Switzerland; Department of Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Portugal; Department of Neurology (M.A.J., S.F.Z., A.C.C.), University of Toledo, OH; Department of Clinical Neurosciences (S. Nannoni), University of Cambridge, United Kingdom; Department of Neurology (M.F., S.O.-G.), University of Iowa, Iowa City; Department of Radiology (P.V., E.P.), Helsinki University Hospital, University of Helsinki, Finland; Institute of Neuroradiology (D.P.O.K.), Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Neurology (L.S., S.Y.), Rhode Island Hospital, Providence; Department of Neurology (Z.Q.), 903rd Hospital of The Chinese People's Liberation Army, Hangzhou, China; Department of Neurology (H.E.M.), State University of New York, Syracuse; Department of Neurology (W.H.), The First Affiliated Hospital of USTC, China; Department of Cerebrovascular Medicine (K.T.), National Cerebral and Cardiovascular Center, Suita, Japan; Department of Stroke Neurology (H.Y.), NHO Osaka National Hospital, Japan; Department of Neurology (U.F.), University Hospital Basel, Switzerland; Department of Neurology (U.F.), University Hospital Bern, Switzerland; and Department of Neurology (T.G.J.), Cooper University Hospital, Camden, NJ.

Publisher: Lippincott Williams & Wilkins Country of Publication: United States NLM ID: 0401060 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1526-632X (Electronic) Linking ISSN: 00283878 NLM ISO Abbreviation: Neurology Subsets: MEDLINE

Costalat V; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Jovin TG; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Albucher JF; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Cognard C; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Henon H; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Nouri N; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Gory B; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Richard S; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Marnat G; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Sibon I; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Di Maria F; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Annan M; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Boulouis G; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Cardona P; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Obadia M; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Piotin M; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Bourcier R; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Guillon B; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Godard S; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Pasco-Papon A; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Eker OF; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Cho TH; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Turc G; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Naggara O; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Velasco S; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Lamy M; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Clarençon F; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Alamowitch S; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Renu A; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Suissa L; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Brunel H; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Gentric JC; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Timsit S; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Lamy C; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Chivot C; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Macian-Montoro F; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Mounayer C; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Ozkul-Wermester O; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Papagiannaki C; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Wolff V; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Pop R; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Ferrier A; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Chabert E; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Ricolfi F; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Béjot Y; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Lopez-Cancio E; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Vega P; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Spelle L; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Denier C; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Millán M; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Arenillas JF; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Mazighi M; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Houdart E; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Del Mar Freijo M; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Duhamel A; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Sanossian N; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Liebeskind DS; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Labreuche J; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Lapergue B; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.; Arquizan C; From the Department of Neuroradiology, Hôpital Gui de Chauliac, Montpellier (V.C.), the Departments of Neurology (J.F. Albucher) and Neuroradiology (C. Cognard), Hôpital Pierre Paul Riquet, and Toulouse Clinical Investigations Centers 1436 (J.F. Albucher, C. Cognard), Toulouse, the Departments of Neurology (H.H.) and Neuroradiology (N.N.), Hôpital Salengro, and the Department of Biostatistics, Centre Hospitalier Universitaire (CHU) Lille (A.D., J.L.), Lille, the Department of Neuroradiology, Hôpital central, L'unité d'Imagerie Adaptative Diagnostique et Interventionnelle, INSERM Unité 1254 (B. Gory), and the Department of Neurology, Hôpital central, Centre d'investigation clinique Plurithématique 1433, INSERM Unité 1116 (S.R.), Nancy, the Departments of Neuroradiology (G.M.) and Neurology (I.S.), Hôpital Pellegrin, Bordeaux, the Department of Neuroradiology, Hôpital Foch, Suresnes (F.D.M.), the Departments of Neurology (M.A.) and Neuroradiology (G.B.), Hôpital Bretonneau, Tours, the Departments of Neurology (M.O.) and Neuroradiology (M.P.), Hôpital Fondation Adolphe de Rothschild, the Departments of Neurology (G.T.) and Neuroradiology (O.N.), Groupe Hospitalier Universitaire Paris, Centre Hospitalier Sainte-Anne, INSERM Unité 1266, the Departments of Neuroradiology (F.C.) and Neurology (S.A.), Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP), the Departments of Neuroradiology (L. Spelle) and Neurology (C.D.), Hôpital Bicêtre, AP-HP, the Departments of Neurology (M. Mazighi) and Neuroradiology (E.H.), Hôpital Lariboisière AP-HP, and INSERM Unité 1266 (C.A.), Paris, the Department of Neuroradiology, Nantes Université, CHU Nantes (R.B.), INSERM Unité Mixte de Recherche 1087, Centre National de la Recherche Scientifique, University of Nantes, L'institut du Thorax (R.B.), and Clinique Neurologique, Hôpital G.R. Laennec CHU Nantes (B. Guillon), Nantes, the Departments of Neurology (S.G.) and Neuroradiology (A.P.-P.), CHU d'Angers, Angers, the Departments of Neuroradiology (O.F.E.) and Neurology (T.-H.C.), Hospices Civils de Lyon, Groupement Hospitalier Est Hôpital Pierre Wertheimer, Lyon, the Departments of Neuroradiology (S.V.) and Neurology (M.L.), CHU Poitiers, Site de La Milétrie, Poitiers, the Stroke Unit (L. Suissa) and the Department of Neuroradiology (H.B.), Assistance Publique-Hôpitaux de Marseille, Hôpital de la Timone, Marseille, the Departments of Neuroradiology (J.-C.G.) and Neurology (S.T.), Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital de la Cavale Blanche, Brest, the Departments of Neurology (C.L.) and Neuroradiology (C. Chivot), CHU Amiens-Picardie, Amiens, the Departments of Neurology (F.M.-M.) and Neuroradiology (C.M.), CHU Limoges, Dupuytren, Limoges, the Departments of Neurology (O.O.-W.) and Neuroradiology (C.P.), CHU Rouen, Rouen, the Departments of Neurology (V.W.) and Neuroradiology (R.P.), CHRU Strasbourg, Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Strasbourg, the Departments of Neurology (A.F.) and Neuroradiology (E.C.), CHU Clermont-Ferrand, Hôpital Gabriel Montpied, Clermont-Ferrand, the Departments of Neuroradiology (F.R.) and Neurology (Y.B.), CHU Dijon-Bourgogne, Hôpital François Mitterrand, Dijon, and the Department of Neurology, Hôpital Foch, Suresnes (B.L.), and the Department of Neurology, Hôpital Gui de Chauliac, Montpellier (C.A.) - all in France; Cooper Neurological Institute and Cooper Medical School of Rowan University, Camden, NJ (T.G.J.); the Department of Neurology, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat (P.C.), and the Department of Neurology, Hospital Clínic de Barcelona (A.R.), Barcelona, the Department of Radiology, Hospital Universitario Central de Asturias, Oviedo (E.L.-C., P.V.), the Department of Neurology Hospital Germans Trias i Pujol, Badalona (M. Millán), Hospital Clínico Universitario de Valladolid, Valladolid (J.F. Arenillas), and the Department of Neurology, Hospital Universitario Cruces, Baracaldo (M.M.F.) - all in Spain; and the Department of Neurology, University of Southern California (N.S.), and the Department of Neurology, UCLA (D.S.L.) - both in Los Angeles.

Publisher: Massachusetts Medical Society Country of Publication: United States NLM ID: 0255562 Publication Model: Print Cited Medium: Internet ISSN: 1533-4406 (Electronic) Linking ISSN: 00284793 NLM ISO Abbreviation: N Engl J Med Subsets: MEDLINE

Islam R; Department of Biomedical Sciences, Cooper Medical School at Rowan University, Camden, NJ, USA.; Cooper Neurological Institute, Cooper University Health Care, Camden, NJ, USA.; Choudhary HH; Department of Biomedical Sciences, Cooper Medical School at Rowan University, Camden, NJ, USA.; Mehta H; Department of Biomedical Sciences, Cooper Medical School at Rowan University, Camden, NJ, USA.; Cooper Neurological Institute, Cooper University Health Care, Camden, NJ, USA.; Zhang F; Department of Biomedical Sciences, Cooper Medical School at Rowan University, Camden, NJ, USA.; Cooper Neurological Institute, Cooper University Health Care, Camden, NJ, USA.; Jovin TG; Department of Biomedical Sciences, Cooper Medical School at Rowan University, Camden, NJ, USA.; Cooper Neurological Institute, Cooper University Health Care, Camden, NJ, USA.; Hanafy KA; Department of Biomedical Sciences, Cooper Medical School at Rowan University, Camden, NJ, USA. hanafy@rowan.edu.; Cooper Neurological Institute, Cooper University Health Care, Camden, NJ, USA. hanafy@rowan.edu.; Center for Neuroinflammation, Cooper Medical School at Rowan University, Camden, NJ, USA. hanafy@rowan.edu.

Publisher: Springer Country of Publication: United States NLM ID: 101517297 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1868-601X (Electronic) Linking ISSN: 18684483 NLM ISO Abbreviation: Transl Stroke Res Subsets: MEDLINE

Rinkel LA; Department of Neurology, Amsterdam University Medical Centers, the Netherlands (L.A.R.).; Department of Clinical Neurosciences, Foothills Medical Center, University of Calgary, AB, Canada (L.A.R., J.M.O., A.M.D., M.D.H., M.G.).; Ospel JM; Department of Neurology, Amsterdam University Medical Centers, the Netherlands (L.A.R.).; Brown SB; BRIGHT Research Partners, Inc, Mooresville, NC (S.B.B.).; Campbell BCV; Department of Medicine and Neurology, Melbourne Brain Centre, Australia (B.C.V.C.).; Dippel DWJ; Department of Neurology, Erasmus MC University Medical Center, Rotterdam, the Netherlands (D.W.J.D.).; Demchuk AM; Department of Clinical Neurosciences, Foothills Medical Center, University of Calgary, AB, Canada (L.A.R., J.M.O., A.M.D., M.D.H., M.G.).; Majoie CBLM; Department of Radiology and Nuclear Medicine, Amsterdam University Medical Centers, University of Amsterdam, the Netherlands (C.B.L.M.M.).; Mitchell PJ; Department of Radiology, Royal Melbourne Hospital, University of Melbourne, Australia (P.J.M.).; Bracard S; Department of Diagnostic and Interventional Neuroradiology, University of Lorraine and University Hospital of Nancy, France (S.B.).; Guillemin F; Clinical Epidemiology Center, University of Lorraine and University Hospital of Nancy, Inserm and Université de Lorraine, France (F.G.).; Jovin TG; Department of Neurology, Stroke Institute, University of Pittsburgh Medical Center Stroke Institute, Presbyterian University Hospital, PA (T.G.J.).; Muir KW; Institute of Neuroscience and Psychology, University of Glasgow, Queen Elizabeth University Hospital, United Kingdom (K.W.M.).; White P; Translational and Clinical Research Institute, Newcastle University, United Kingdom (P.W.).; Saver JL; Neurology and Comprehensive Stroke Center, David Geffen School of Medicine, University of California, Los Angeles (J.L.S.).; Hill MD; Department of Clinical Neurosciences, Foothills Medical Center, University of Calgary, AB, Canada (L.A.R., J.M.O., A.M.D., M.D.H., M.G.).; Goyal M; Department of Clinical Neurosciences, Foothills Medical Center, University of Calgary, AB, Canada (L.A.R., J.M.O., A.M.D., M.D.H., M.G.).

Publisher: Lippincott Williams & Wilkins Country of Publication: United States NLM ID: 0235266 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1524-4628 (Electronic) Linking ISSN: 00392499 NLM ISO Abbreviation: Stroke Subsets: MEDLINE

Koneru M; Department of Neurointerventional Surgery, Cooper Medical School of Rowan University, Camden, USA.; Shaikh HA; Department of Neurointerventional Surgery, Cooper University Health Care, Camden, USA.; Tonetti DA; Department of Neurosurgery, Cooper University Health Care, Camden, USA.; Siegler JE; Department of Neurology, Cooper University Health Care, Camden, USA.; Department of Neurology, University of Chicago Medicine, Chicago, USA.; Khalife J; Department of Neurology, Cooper University Health Care, Camden, USA.; Thomas AJ; Department of Neurosurgery, Cooper University Health Care, Camden, USA.; Jovin TG; Department of Neurology, Cooper University Health Care, Camden, USA.; Mossop CM; Department of Neurosurgery, Cooper University Health Care, Camden, USA.

Publisher: Cureus, Inc Country of Publication: United States NLM ID: 101596737 Publication Model: eCollection Cited Medium: Print ISSN: 2168-8184 (Print) Linking ISSN: 21688184 NLM ISO Abbreviation: Cureus Subsets: PubMed not MEDLINE

Farooqui M; Neurology, The University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA.; Galecio-Castillo M; Neurology, The University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA.; Hassan AE; Department of Neurology, University of Texas Rio Grande Valley, Harlingen, Texas, USA.; Divani AA; Neurology, University of New Mexico Health System, Albuquerque, New Mexico, USA.; Jumaa M; Neurology, Promedica Toledo Hospital, Toledo, Ohio, USA.; Ribo M; Stroke Unit, Neurology, Hospital Vall d'Hebron, Barcelona, Spain.; Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain.; Petersen NH; Neurology, Yale School of Medicine, New Haven, Connecticut, USA.; Abraham MG; Neurology and Radiology, University of Kansas Medical Center, Kansas City, Kansas, USA.; Fifi JT; Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA.; Guerrero WR; Neurosurgery, University of South Florida, Tampa, Florida, USA.; Malik A; Neurology, University of Miami Miller School of Medicine, Miami, Florida, USA.; Siegler JE; Cooper Neurological Institute, Cooper University Health Care, Camden, New Jersey, USA.; Nguyen TN; Neurology, Boston University School of Medicine, Boston, Massachusetts, USA.; Sheth SA; Neurology, University of Texas Health Science Center at Houston, Houston, Texas, USA.; Yoo AJ; Neurointervention, Texas Stroke Institute, Plano, Texas, USA.; Linares G; Neurology, School of Medicine Saint Louis University, Saint Louis, Missouri, USA.; Janjua N; Neurology, Pomona Valley Hospital Medical Center, Pomona, California, USA.; Quispe-Orozco D; Neurology, The University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA.; Tekle WG; Department of Neurology, Valley Baptist Medical Center - Harlingen, Harlingen, Texas, USA.; Sabbagh SY; Neurology, University of New Mexico Health System, Albuquerque, New Mexico, USA.; Zaidi SF; Neurology, University of Toledo Health Science Campus, Toledo, Ohio, USA.; Olive Gadea M; Neurology, Hospital Vall d'Hebron, Barcelona, Barcelona, Spain.; Prasad A; Yale University School of Medicine, New Haven, Connecticut, USA.; Qureshi A; Neurology and Radiology, University of Kansas Medical Center, Kansas City, Kansas, USA.; De Leacy RA; Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA.; Abdalkader M; Radiology, Boston Medical Center, Boston, Massachusetts, USA.; Salazar-Marioni S; Neurology, University of Texas McGovern Medical School, Houston, Texas, USA.; Soomro J; Texas Stroke Institute, Plano, Texas, USA.; Gordon W; Neurology, University of Kansas Medical Center, Kansas City, Kansas, USA.; Turabova C; Neurology, Pomona Valley Hospital Medical Center, Pomona, California, USA.; Rodriguez-Calienes A; The University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA.; Grupo de Investigacion Neurociencia, Efectividad Clinica y Salud Publica, Universidad Cientifica del Sur Facultad de Ciencias de la Salud, Lima, Peru.; Vivanco-Suarez J; Neurology, The University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA.; Mokin M; Neurosurgery, University of South Florida College of Medicine, Tampa, Florida, USA.; Yavagal DR; Neurology and Neurosurgery, University of Miami, Miami, Florida, USA.; Jovin TG; Neurology, Cooper University Hospital, Camden, New Jersey, USA.; Ortega-Gutierrez S; Neuroloy, Neurosurgery and Radiology, The University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA santy-ortega@uiowa.edu.

Publisher: BMJ Publishing Group Country of Publication: England NLM ID: 101517079 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1759-8486 (Electronic) Linking ISSN: 17598478 NLM ISO Abbreviation: J Neurointerv Surg Subsets: MEDLINE

Vigilante N; 1Cooper Medical School of Rowan University, Camden, New Jersey.; Khalife J; 1Cooper Medical School of Rowan University, Camden, New Jersey.; 2Cooper Neurological Institute, Cooper University Hospital, Camden, New Jersey.; Badger CA; 1Cooper Medical School of Rowan University, Camden, New Jersey.; 3Department of Neurosurgery, Cooper Neurological Institute, Cooper University Hospital, Camden, New Jersey.; Shaikh H; 1Cooper Medical School of Rowan University, Camden, New Jersey.; 3Department of Neurosurgery, Cooper Neurological Institute, Cooper University Hospital, Camden, New Jersey.; Thomas AJ; 1Cooper Medical School of Rowan University, Camden, New Jersey.; 3Department of Neurosurgery, Cooper Neurological Institute, Cooper University Hospital, Camden, New Jersey.; Swendseid B; 1Cooper Medical School of Rowan University, Camden, New Jersey.; 4Division of Otolaryngology - Head and Neck Surgery, Cooper University Hospital, Camden, New Jersey; and.; Jovin TG; 1Cooper Medical School of Rowan University, Camden, New Jersey.; 2Cooper Neurological Institute, Cooper University Hospital, Camden, New Jersey.; Siegler JE; 5Department of Neurology, University of Chicago, Chicago, Illinois.; Tonetti DA; 1Cooper Medical School of Rowan University, Camden, New Jersey.; 2Cooper Neurological Institute, Cooper University Hospital, Camden, New Jersey.; 3Department of Neurosurgery, Cooper Neurological Institute, Cooper University Hospital, Camden, New Jersey.

Publisher: American Association of Neurosurgeons dba Journal of Neurosurgery Publishing Group Country of Publication: United States NLM ID: 9918227275606676 Publication Model: Electronic-Print Cited Medium: Internet ISSN: 2694-1902 (Electronic) Linking ISSN: 26941902 NLM ISO Abbreviation: J Neurosurg Case Lessons Subsets: PubMed not MEDLINE

Hanafy KA; Cooper Neurological Institute and Cooper Medical School at Rowan University, Camden, NJ, United States.; Center for Neuroinflammation at Cooper Medical School at Rowan University, Camden, NJ, United States.; Jovin TG; Cooper Neurological Institute and Cooper Medical School at Rowan University, Camden, NJ, United States.

Publisher: Frontiers Research Foundation] Country of Publication: Switzerland NLM ID: 101560960 Publication Model: eCollection Cited Medium: Internet ISSN: 1664-3224 (Electronic) Linking ISSN: 16643224 NLM ISO Abbreviation: Front Immunol Subsets: MEDLINE

Fiorella D; Department of Neurosurgery, Stony Brook University, Stony Brook, New York, USA david.fiorella@stonybrookmedicine.edu.; SUNY SB, Stony Brook, New York, USA.; Jovin TG; Neurology, Cooper University Hospital, Camden, New Jersey, USA.; Arthur AS; Semmes-Murphey Neurologic and Spine Institute, Memphis, Tennessee, USA.; Neurosurgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA.; Nogueira R; UPMC, Pittsburgh, Pennsylvania, USA.; Siddiqui AH; Neurosurgery and Radiology and Canon Stroke and Vascular Research Center, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, New York, USA.; Neurosurgery, Gates Vascular Institute, Buffalo, New York, USA.; Hirsch JA; NeuroEndovascular Program, Massachusetts General Hospital, Boston, Massachusetts, USA.; Albuquerque FC; Department of Neurosurgery, Barrow Neurological Institute, Phoenix, Arizona, USA.

Publisher: BMJ Publishing Group Country of Publication: England NLM ID: 101517079 Publication Model: Electronic Cited Medium: Internet ISSN: 1759-8486 (Electronic) Linking ISSN: 17598478 NLM ISO Abbreviation: J Neurointerv Surg Subsets: MEDLINE