1. Division of Endocrinology and Metabolism, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
2. Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
3. Department of Obstetrics and Gynecology, Soonchunhyang University College of Medicine, Bucheon, Korea.
4. Department of Orthopedic Surgery, Guro Hospital, Korea University College of Medicine, Seoul, Korea.
5. Department of Obstetrics and Gynecology, Guro Hospital, Korea University College of Medicine, Seoul, Korea.
6. Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.
7. Division of Endocrinology and Metabolism, Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, Korea.