1. Division of Endocrinology and Metabolism, Department of Internal Medicine Korea University College of Medicine Seoul South Korea
2. Division of Endocrinology and Metabolism, Department of Internal Medicine Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea Seoul South Korea
3. Department of Internal Medicine Soonchunhyang University Cheonan Hospital, Soonchunhyang University College of Medicine Cheonan South Korea
4. Department of Internal Medicine Seoul National University Hospital Seoul South Korea
5. Division of Endocrinology and Metabolism, Department of Internal Medicine College of Medicine, South Korea University Guro Hospital Seoul South Korea
6. Department of Internal Medicine Seoul National University College of Medicine, Seoul National University Bundang Hospital Seongnam South Korea
7. Division of Endocrinology and Metabolism, Department of Internal Medicine Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine Bucheon South Korea
8. Division of Endocrinology and Metabolism, Department of Internal Medicine Yeungnam University College of Medicine Daegu South Korea
9. Division of Endocrinology and Metabolism, Department of Internal Medicine Korea University Ansan Hospital, Korea University College of Medicine Ansan South Korea
10. Division of Endocrinology and Metabolism, Department of Internal Medicine Yonsei University College of Medicine Seoul South Korea
11. Division of Endocrinology and Metabolism, Department of Internal Medicine Inje University Haeundae Paik Hospital, Inje University College of Medicine Busan South Korea
12. Division of Endocrinology, Department of Internal Medicine Catholic University of Daegu School of Medicine Daegu South Korea
13. Division of Endocrinology and Metabolism, Department of Internal Medicine Kangdong Sacred Heart Hospital, Hallym University College of Medicine Seoul South Korea