부산대학교 도서관

Ve, T.A.; Hestad, O.L.; Hvidsten, S.

IEEE Transactions on Dielectrics and Electrical Insulation IEEE Trans. Dielect. Electr. Insul. Dielectrics and Electrical Insulation, IEEE Transactions on. 30(2):501-508 Apr, 2023

Kaunda, Lumbuka; Ngoma, Mary S.; Anitha Menon, J.; Heaton, Robert K.; Gianella, Sara; Bharti, Ajay R.; Letendre, Scott; de Oliveira, Michelli Faria; Hestad, Knut A.

Neuroscience. 580

Fazey, Ioan; Schapke, Niko; Caniglia, Guido; Hodgson, Anthony; Kendrick, Ian; Lyon, Christopher; Page, Glenn; Patterson, James; Riedy, Chris; Strasser, Tim; Verveen, Stephan; Adams, David; Goldstein, Bruce; Klaes, Matthias; Leicester, Graham; Linyard, Alison; McCurdy, Adrienne; Ryan, Paul; Sharpe, Bill; Silvestri, Giorgia; Abdurrahim, Ali Yansyah; Abson, David; Adetunji, Olufemi Samson; Aldunce, Paulina; Alvarez-Pereira, Carlos; Amparo, Jennifer Marie; Amundsen, Helene; Anderson, Lakin; Andersson, Lotta; Asquith, Michael; Augenstein, Karoline; Barrie, Jack; Bent, David; Bentz, Julia; Bergsten, Arvid; Berzonsky, Carol; Bina, Olivia; Blackstock, Kirsty; Boehnert, Joanna; Bradbury, Hilary; Brand, Christine; Bohme, Jessica; Bojer, Marianne Mille; Carmen, Esther; Charli-Joseph, Lakshmi; Choudhury, Sarah; Chunhachoti-ananta, Supot; Cockburn, Jessica; Colvin, John; Connon, Irena L. C.; Cornforth, Rosalind; Cox, Robin S.; Cradock-Henry, Nicholas; Cramer, Laura; Cremaschi, Almendra; Dannevig, Halvor; Day, Catherine T.; Hutchison, Cathel de Lima; de Vrieze, Anke; Desai, Vikas; Dolley, Jonathan; Duckett, Dominic; Durrant, Rachael Amy; Egermann, Markus; Elsner (Adams), Emily; Fremantle, Chris; Fullwood-Thomas, Jessica; Galafassi, Diego; Gobby, Jen; Golland, Ami; Gonzalez-Padron, Shiara Kirana; Gram-Hanssen, Irmelin; Grandin, Jakob; Grenni, Sara; Gunnell, Jade Lauren; Gusmao, Felipe; Hamann, Maike; Harding, Brian; Harper, Gavin; Hesselgren, Mia; Hestad, Dina; Heykoop, Cheryl Anne; Holmen, Johan; Holstead, Kirsty; Hoolohan, Claire; Horcea-Milcu, Andra-Ioana; Horlings, Lummina Geertruida; Howden, Stuart Mark; Howell, Rachel Angharad; Huque, Sarah Insia; Canedo, Mirna Liz Inturias; Iro, Chidinma Yvonne; Ives, Christopher D.; John, Beatrice; Joshi, Rajiv; Juarez-Bourke, Sadhbh; Juma, Dauglas Wafula; Karlsen, Bea Cecilie; Kliem, Lea; Klaey, Andreas; Kuenkel, Petra; Kunze, Iris; Lam, David Patrick Michael; Lang, Daniel J.; Larkin, Alice; Light, Ann; Luederitz, Christopher; Luthe, Tobias; Maguire, Cathy; Mahecha-Groot, Ana-Maria; Malcolm, Jackie; Marshall, Fiona; Maru, Yiheyis; McLachlan, Carly; Mmbando, Peter; Mohapatra, Subhakanta; Moore, Michele-Lee; Moriggi, Angela; Morley-Fletcher, Mark; Moser, Susanne; Mueller, Konstanze Marion; Mukute, Mutizwa; Muhlemeier, Susan; Naess, Lars Otto; Nieto-Romero, Marta; Novo, Paula; O'Brien, Karen; O'Connell, Deborah Anne; O'Donnell, Kathleen; Olsson, Per; Pearson, Kelli Rose; Pereira, Laura; Petridis, Panos; Peukert, Daniela; Phear, Nicky; Pisters, Siri Renee; Polsky, Matt; Pound, Diana; Preiser, Rika; Rahman, Md. Sajidur; Reed, Mark S.; Revell, Philip; Rodriguez, Iokine; Rogers, Briony Cathryn; Rohr, Jascha; Rosenberg, Milda Nordbo; Ross, Helen; Russell, Shona; Ryan, Melanie; Saha, Probal; Schleicher, Katharina; Schneider, Flurina; Scoville-Simonds, Morgan; Searle, Beverley; Sebhatu, Samuel Petros, 1972; Sesana, Elena; Silverman, Howard; Singh, Chandni; Sterling, Eleanor; Stewart, Sarah-Jane; Tabara, J. David; Taylor, Douglas; Thornton, Philip; Tribaldos, Theresa Margarete; Tschakert, Petra; Uribe-Calvo, Natalia; Waddell, Steve; Waddock, Sandra; van der Merwe, Liza; van Mierlo, Barbara; van Zwanenberg, Patrick; Velarde, Sandra Judith; Washbourne, Carla-Leanne; Waylen, Kerry; Weiser, Annika; Wight, Ian; Williams, Stephen; Woods, Mel; Wolstenholme, Ruth; Wright, Ness; Wunder, Stefanie; Wyllie, Alastair; Young, Hannah R.

Energy Research & Social Science. 70

Lumbuka Kaunda; Mary S. Ngoma; J. Anitha Menon; Robert K. Heaton; Sara Gianella; Ajay R. Bharti; Scott Letendre; Michelli Faria de Oliveira; Knut A. Hestad

Journal of NeuroVirology, vol 29, iss 1

Madshaven, I.; Smalo, H. S.; Unge, M.; Hestad, O. L.

2016 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Electrical Insulation and Dielectric Phenomena (CEIDP), 2016 IEEE Conference on. :400-403 Oct, 2016

Madshaven, I.; Åstrand, P. -O.; Hestad, O. L.; Ingebrigtsen, S.; Unge, M.; Hjortstam, O.

Journal of Physics Communications 2:105007 (2018)

Hestad, O. L.; Grav, T.; Lundgaard, L. E.; Ingebrigtsen, S.; Unge, M.; Hjortstam, O.

2014 IEEE 18th International Conference on Dielectric Liquids (ICDL) Dielectric Liquids (ICDL), 2014 IEEE 18th International Conference on. :1-5 Jun, 2014

Hestad, O.L.; Hvidsten, S.

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Electrical Insulation Electrical Insulation, 2006. Conference Record of the 2006 IEEE International Symposium on. :515-518 2006

Hestad, O.L.; Ingebrigsten, S.; Lundgaard, L.E.

IEEE International Conference on Dielectric Liquids, 2005. ICDL 2005. Dielectric liquids Dielectric Liquids, 2005. ICDL 2005. 2005 IEEE International Conference on. :123-126 2005

Andersson, S.; Hestad, K.; Okkenhaug, I.; Gramstad, A.; Andreassen, O.I.; Lanneskog, A.M.; Sørensen, B.A.; Søbstad, M.T.; Løkholm, M.T.; Hornslien, A.G.; Bøen, E.; Pignatiello, S.E.; Boldingh, M.I.; Aamodt, A.H.; Boye, B.

Journal of Psychosomatic Research. 169

Vallentin, Mikael Fink ; Holmberg, Mathias J. ; Granfeldt, Asger ; Klitgaard, Thomas Lass ; Mikkelsen, Søren ; Folke, Fredrik ; Christensen, Helle Collatz ; Povlsen, Amalie Ling ; Petersen, Alberthe Hjort ; Winther, Sofie ; Frilund, Lea Wildt ; Meilandt, Carsten ; Winther, Kristian Blumensaadt ; Bach, Allan ; Dissing, Thomas H. ; Terkelsen, Christian Juhl ; Christensen, Steffen ; Rasmussen, Line Kirkegaard ; Mortensen, Lone Riis ; Loldrup, Mads Ladefoged ; Elkmann, Thomas ; Nielsen, Anders Gunnar ; Runge, Charlotte ; Klæstrup, Elise ; Holm, Jimmy Højberg ; Bak, Mikkel ; Nielsen, Lars-Gustav Rahbek ; Pedersen, Mette ; Kjærgaard-Andersen, Gunhild ; Hansen, Peter Martin ; Brøchner, Anne Craveiro ; Christensen, Erika Frischknecht ; Nielsen, Frederik Mølgaard ; Nissen, Christian Gade ; Bjørn, Jeppe Waldstrøm ; Burholt, Peter ; Obling, Laust E.R. ; Holle, Sarah Louise Duus ; Russell, Lene ; Alstrøm, Henrik ; Hestad, Søren ; Fogtmann, Tanja Hesse ; Hove Buciek, Jens Ulrik ; Jakobsen, Karina ; Krag, Mette ; Sandgaard, Michael ; Sindberg, Birthe ; Andersen, Lars W.

In Resuscitation July 2025 212

Andersson, S.; Hestad, K.; Johannessen, D.; Okkenhaug, I.; Gramstad, A.; Andreassen, O.; Lanneskog, A.; Sørensen, B.; Bøen, E.; Boldingh, M.; Aamodt, A.; Boye, B.

Journal of Psychosomatic Research. 157

Ma Y; Thornton T; Mangalagiu D; Lan J; Hestad D; Apostoli Cappello E; Van der Leeuw S

Climatic Change. 160:621-636

Hestad, O.L.; Smalo, H.S.; Astrand, P.-O.; Ingebrigtsen, S.; Lundgaard, L.E.

IEEE Transactions on Dielectrics and Electrical Insulation IEEE Trans. Dielect. Electr. Insul. Dielectrics and Electrical Insulation, IEEE Transactions on. 18(6):1886-1896 Dec, 2011

Hestad, Knut A; Chinyama, Jonathan; Anitha, Menon J; Ngoma, Mary S; McCutchan, J Allen; Franklin, Donald R; Heaton, Robert K

JAIDS Journal of Acquired Immune Deficiency Syndromes, vol 80, iss 1

Helge Toft; Jørgen G Bramness; Lars Lien; Dawit S Abebe; Bruce E Wampold; Terje Tilden; Knut Hestad; Sudan Prasad Neupane

Neuropsychiatr Dis Treat
Neuropsychiatric Disease and Treatment

Mwila, Prispa; Menon, J. Anitha; Opheim, Elin; Monde, Mercy Wamunyima; Hestad, Knut

BMC Public Health. November 3, 2025, Vol. 25 Issue 1

Fazey, I; Schäpke, N; Caniglia, G; Hodgson, A; Kendrick, I; Lyon, C; Page, G; Patterson, J; Riedy, C; Strasser, T; Verveen, S; Adams, D; Goldstein, B; Klaes, M; Leicester, G; Linyard, A; McCurdy, A; Ryan, P; Sharpe, B; Silvestri, G; Abdurrahim, AY; Abson, D; Adetunji, OS; Aldunce, P; Alvarez-Pereira, C; Amparo, JM; Amundsen, H; Anderson, L; Andersson, L; Asquith, M; Augenstein, K; Barrie, J; Bent, D; Bentz, J; Bergsten, A; Berzonsky, C; Bina, O; Blackstock, K; Boehnert, J; Bradbury, H; Brand, C; Böhme (born Sangmeister), J; Bøjer, MM; Carmen, E; Charli-Joseph, L; Choudhury, S; Chunhachoti-ananta, S; Cockburn, J; Colvin, J; Connon, ILC; Cornforth, R; Cox, RS; Cradock-Henry, N; Cramer, L; Cremaschi, A; Dannevig, H; Day, CT; de Lima Hutchison, C; de Vrieze, A; Desai, V; Dolley, J; Duckett, D; Durrant, RA; Egermann, M; Elsner (Adams), E; Fremantle, C; Fullwood-Thomas, J; Galafassi, D; Gobby, J; Golland, A; González-Padrón, SK; Gram-Hanssen, I; Grandin, J; Grenni, S; Lauren Gunnell, J; Gusmao, F; Hamann, M; Harding, B; Harper, G; Hesselgren, M; Hestad, D; Heykoop, CA; Holmén, J; Holstead, K; Hoolohan, C; Horcea-Milcu, AI; Horlings, LG; Howden, SM; Howell, RA; Huque, SI; Inturias Canedo, ML; Iro, CY; Ives, CD; John, B; Joshi, R; Juarez-Bourke, S; Juma, DW; Karlsen, BC; Kliem, L; Kläy, A

Shaker, S.B.; Wachenfeldt, K.A. von; Larsson, S.; Mile, I.; Persdotter, S.; Dahlback, M.; Broberg, P.; Stoel, B.; Bach, K.S.; Hestad, M.; Fehniger, T.E.; Dirksen, A.

The Clinical Respiratory Journal. 2:17-25

Vallentin MF; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Granfeldt A; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Klitgaard TL; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Mikkelsen S; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Folke F; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Christensen HC; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Povlsen AL; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Petersen AH; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Winther S; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Frilund LW; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Meilandt C; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Holmberg MJ; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Winther KB; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Bach A; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Dissing TH; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Terkelsen CJ; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Christensen S; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Kirkegaard Rasmussen L; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Mortensen LR; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Loldrup ML; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Elkmann T; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Nielsen AG; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Runge C; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Klæstrup E; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Holm JH; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Bak M; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Nielsen LR; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Pedersen M; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Kjærgaard-Andersen G; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Hansen PM; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Brøchner AC; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Christensen EF; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Nielsen FM; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Nissen CG; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Bjørn JW; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Burholt P; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Obling LER; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Holle SLD; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Russell L; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Alstrøm H; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Hestad S; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Fogtmann TH; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Buciek JUH; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Jakobsen K; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Krag M; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Sandgaard M; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Sindberg B; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.; Andersen LW; From Prehospital Emergency Medical Services, Central Denmark Region (M.F.V., A.L.P., A.H.P., S.W., L.W.F., C.M., K.B.W., A.B., T.H.D., L.K.R., L.R.M., M.L.L., T.E., A.G.N., C.R., L.W.A.), the Department of Clinical Medicine, Aarhus University (M.F.V., A.G., C.J.T., S.C., L.W.A.), and the Departments of Anesthesiology and Intensive Care (A.G., M.J.H., T.H.D., S.C., C.G.N., B.S., L.W.A.), Cardiology (C.J.T.), and Radiology (E.K.), Aarhus University Hospital, Aarhus, the Department of Anesthesiology and Intensive Care, Aalborg University Hospital (T.L.K., F.M.N.), the Center for Prehospital and Emergency Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital (E.F.C.), and Emergency Medical Services, North Denmark Region (P.B.), Aalborg, the Prehospital Research Unit (S.M., P.M.H.) and Emergency Medical Services (J.H.H., M.B., L.-G.R.N., M.P., G.K.-A., P.M.H.), Region of Southern Denmark, the Department of Anesthesiology and Intensive Care, Odense University Hospital (J.H.H., M.B.), and the Department of Regional Health Research, University of Southern Denmark (A.C.B.), Odense, the Departments of Cardiology (F.F.) and of Anesthesiology and Intensive Care (L.R.), Copenhagen University Hospital, Gentofte Copenhagen University Hospital-Emergency Medical Services, Ballerup (F.F., J.W.B., H.A., S.H., T.H.F.), the Department of Clinical Medicine, University of Copenhagen (F.F., H.C.C., L.R., M.K.), and the Department of Cardiology, the Heart Center, Copenhagen University Hospital, Rigshospitalet (L.E.R.O., S.L.D.H.), Copenhagen, the Prehospital Center, Region Zealand, Næstved (H.C.C.), the Department of Anesthesiology and Intensive Care, Gødstrup Regional Hospital, Gødstrup (L.K.R.), the Department of Anesthesiology and Intensive Care, Randers Regional Hospital, Randers (L.R.M., T.E.), the Department of Anesthesiology and Intensive Care, Viborg Regional Hospital, Viborg (A.G.N.), the Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg (C.R.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Esbjerg and Grindsted, Esbjerg (L.-G.R.N.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Kolding (M.P., A.C.B.), the Department of Anesthesiology and Intensive Care, University Hospital of Southern Denmark, Aabenraa (G.K.-A.), the Department of Anesthesiology and Intensive Care, Svendborg Hospital, Svendborg (P.M.H.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital, Herlev (H.A.), the Department of Anesthesiology and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød (S.H.), the Department of Anesthesiology and Intensive Care, Zealand University Hospital, Køge (J.U.H.B.), the Department of Anesthesiology and Intensive Care, Nykøbing Falster Hospital, Nykøbing Falster (K.J.), the Department of Anesthesiology and Intensive Care, Holbæk Hospital, Holbæk (M.K.), and the Department of Anesthesiology and Intensive Care, Slagelse Hospital, Slagelse (M.S.) - all in Denmark.

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