1 Dr. Bateman is from the Department of Anesthesiology, Perioperative and Pain Medicine, Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts. Dr. Robinson is from the Department of Obstetrics and Gynecology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts; email: bbateman@bwh.harvard.edu.