1. From the Department of Research and Evaluation, Ambulance Victoria, Melbourne, Australia (Z.N., S.B., M.L., K.S.); Department of Epidemiology and Preventive Medicine, School of Public Health and Preventative Medicine, Monash University, Melbourne, Australia (Z.N., S.B., P.C., J.E.B., M.L., K.S.); Intensive Care Department, The Alfred Hospital, Melbourne, Australia (S.B.); Department of Cardiology, MonashHeart, Monash Medical Centre, Melbourne, Australia (I.T.M.); and Discipline of Emergency Medicine...