1. Division of Endocrinology, Metabolism and Molecular Medicine, the Feinberg School of Medicine, Northwestern University, Chicago, Illinois
2. Section of Endocrinology, Diabetes, and Nutrition, Boston University, Boston, Massachusetts
3. Division of Endocrinology, Ewha Womans University, Seoul, Korea
4. Department of Obstetrics and Gynecology, Pennsylvania State University, Hershey, Pennsylvania