1. From Public Health–Seattle and King County, Emergency Medical Services Division (L.L.C., T.D.R., B.W., J.A.M., M.S.E.); Seattle Medic One (C.E.F., M.O., M.K.C.); and the Department of Medicine, University of Washington (T.D.R., J.A.M., M.S.E., C.E.F., M.O., M.K.C.), Seattle, Wash.