1. Department of Endocrinology and Metabolism, Ajou University School of Medicine, Suwon, Korea.
2. Cardiovascular and Metabolic Disease Etiology Research Center, Ajou University School of Medicine, Suwon, Korea.
3. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Endocrinology and Metabolism, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
5. Department of Family Medicine, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Korea.
6. Policy Research Affairs, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
7. Department of Family Medicine, National Health Insurance Service Ilsan Hospital, Goyang, Korea.