| Institution: | 1. Department of Obstetrics and Gynecology (Drs. Cope, Wetzstein, Laughlin-Tommaso, and Burnett);2. Division of Biomedical Statistics and Informatics (Dr. Mara);3. Department of Anesthesiology and Perioperative Medicine (Dr. Warner);4. Kern Center for the Science of Health Care Delivery (Dr. Warner), Mayo Clinic, Rochester, Minnesota;1. Department of Anesthesiology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China;2. Department of Anesthesiology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China |
