1 Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, and Department of Emergency Medicine, Washington University School of Medicine, St. Louis, MO Department of Pharmacy, Barnes-Jewish Hospital, St. Louis, MO Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, and Department of Surgery, Washington University School of Medicine, St. Louis, MO.