1. From the Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine (M.E.P., S.J.H.), and the Department of Emergency Medicine (M.E.P., B.E.D.), Hennepin County Medical Center, Minneapolis; the Department of Emergency Medicine (S.A.T.) and the Division of Pulmonary, Critical Care, and Sleep Medicine (I.S.D., T.G.), Denver Health Medical Center, Denver, and the Department of Emergency Medicine (S.A.T., D.R.-A., J.J.B., A.A.G.) and the Department of Medicine, Division of Pulmonary...