1. Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, and Center for Drug Safety and Effectiveness, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
2. Harvard Medical School, Boston, MA, and Division of Acute Care Surgery, Beth Israel Deaconess Medical Center, Boston, MA
3. Gastrointestinal Epidemiology Research Center, Department of Gastroenterology, Johns Hopkins University School of Medicine, Baltimore, MD
4. Department of Anesthesiology, Hospital for Special Surgery, and Department of Anesthesiology, Weill Cornell Medicine, New York, NY
5. Department of Pharmacy, Johns Hopkins Hospital, and Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins Hospital, Baltimore, MD
6. Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, and Division of General Internal Medicine, Johns Hopkins University School of Medicine, Baltimore, MD