1. Division of Endocrinology and Metabolism, Department of Internal Medicine Keimyung University School of Medicine Daegu South Korea
2. Division of Endocrinology and Metabolism, Department of Internal Medicine Hallym University Sacred Heart Hospital Anyang South Korea
3. 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
4. Division of Endocrinology and Metabolism, Department of Internal Medicine, Samsung Changwon Hospital Sungkyunkwan University School of Medicine Changwon South Korea
5. Division of Endocrinology and Metabolism, Department of Internal Medicine Soonchunhyang University Cheonan Hospital Cheonan South Korea
6. Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine Hanyang University Seoul South Korea
7. Division of Endocrinology and Metabolism, Department of Internal Medicine Seoul National University Seoul South Korea
8. Division of Endocrinology and Metabolism, Department of Internal Medicine Yonsei University College of Medicine Seoul South Korea
9. Institute of Endocrine Research, Yonsei University College of Medicine Seoul South Korea