1. From the Department of Cardiology, Copenhagen University Hospital Gentofte, Denmark (C.M.H., M.W., P.W., M.H.R., L.K., G.H.G., F.F.); The Emergency Medical Services, Copenhagen, Copenhagen University, Denmark (F.K.L., S.L.N., F.F.); The National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark (L.Z., G.H.G.); The Heart Centre, Copenhagen University Hospital Rigshospitalet, Denmark (L.K.); and The Institute of Health, Science and Technology, Aalborg University, Denmark ...