1 The Department of Emergency Medicine, Cooper University Hospital, Cooper Medical School of Rowan University, Camden, New Jersey; Departments of Emergency Medicine and Anesthesiology, Division of Critical Care Medicine, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA; Department of Emergency Medicine, Washington University School of Medicine in St. Louis, St. Louis, MO, and Department of Anesthesiology, Division of Critical Care, Washington University School of Medicine in St. Louis, St. Louis, MO; Department of Emergency Medicine, Washington University School of Medicine in St. Louis, St. Louis, MO; School of Medicine and Medical Science, University College Dublin, Dublin, Ireland; The Department of Emergency Medicine, Cooper University Hospital, Cooper Medical School of Rowan University, Camden, NJ, and The Department of Medicine, Division of Critical Care Medicine, Cooper University Hospital, Cooper Medical School of Rowan University, Camden, NJ; Department of Medicine, Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine in St. Louis, St. Louis, MO; Department of Emergency Medicine, Washington University School of Medicine in St. Louis, St. Louis, MO, and Department of Anesthesiology, Division of Critical Care, Washington University School of Medicine in St. Louis, St. Louis, MO.