1. Division of Endocrinology and Metabolism Department of Internal Medicine National Health Insurance Service Ilsan Hospital Goyang Korea
2. Division of Endocrinology and Metabolism Department of Internal Medicine St. Vincent's Hospital The Catholic University College of Medicine Seoul Korea
3. Division of Endocrinology and Metabolism Department of Internal Medicine Soonchunhyang University College of Medicine Bucheon Hospital Bucheon Korea
4. Department of Endocrinology and Metabolism Ajou University School of Medicine Suwon Korea
5. Division of Endocrinology and Metabolism Inha University Hospital Inha University School of Medicine Incheon Korea
6. Division of Endocrinology and Metabolism Department of Internal Medicine Inje University Ilsan Paik Hospital Inje University College of Medicine Goyang Korea
7. Division of Endocrinology and Metabolism Department of Internal Medicine Korea University Ansan Hospital Korea University College of Medicine Ansan Korea
8. Division of Endocrinology and Metabolism Department of Internal Medicine CHA Bundang Medical Center CHA University Seongnam Korea