1. From the Departments of Emergency Medicine (J.N.G.), Medicine (D.M.D.), and Pathology (G.L.), Massachusetts General Hospital, the Department of Emergency Medicine, Brigham and Women’s Hospital (T.B.E.), and the Departments of Emergency Medicine (J.N.G., T.B.E.), Medicine (D.M.D.), and Pathology (G.L.), Harvard Medical School — all in Boston.