1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
2. Department of Medical Informatics, College of Medicine, The Catholic University of Korea, Seoul, Korea.
3. College of Pharmacy, Sookmyung Women's University, Seoul, Korea.
4. Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
5. Clinical Research Coordinating Center, Catholic Medical Center, The Catholic University of Korea, Seoul, Korea.
6. Department of Preventive Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.