1. Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, The Ohio State University College of Medicine, Columbus
2. Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
3. Department of Medicine, Division of Cardiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
4. Departments of Medicine and Obstetrics, Gynecology, and Reproductive Biology, Diabetes Unit, Massachusetts General Hospital, Harvard Medical School, Boston