1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Soonchunhyang University Hospital Soonchunhyang University College of Medicine Seoul Korea
2. Department of Internal Medicine, Dongguk University Ilsan Hospital Dongguk University School of Medicine Goyang Korea
3. Department of Internal Medicine, Eulji General Hospital Eulji University School of Medicine Seoul Korea
4. Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine The Catholic University of Korea Seoul Korea
5. Division of Endocrinology and Metabolism, Department of Internal Medicine, Kyung Hee University Hospital at Gangdong Kyung Hee University School of Medicine Seoul Korea
6. Department of Internal Medicine Yonsei University College of Medicine Seoul Korea
7. Department of Internal Medicine Korea University Ansan Hospital Ansan Korea
8. Department of Internal Medicine Gachon University School of Medicine Incheon Korea
9. Department of Internal Medicine Keimyung University School of Medicine Daegu Korea
10. Department of Internal Medicine, Wonju College of Medicine Yonsei University Wonju Korea
11. Department of Internal Medicine Seoul National University College of Medicine Seoul Korea
12. Division of Endocrinology and Metabolism, Department of Internal Medicine Eulji University School of Medicine Daejeon Korea
13. Department of Nuclear Medicine Semyung Christianity Hospital Pohang Korea
14. Department of Endocrinology and Metabolism, Ajou University Hospital Ajou University School of Medicine Suwon Korea