1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
2. Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea.
3. Healthcare Group, Lee & Ko, Seoul, Korea.
4. Department of Family Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.