1. Division of Endocrinology and Metabolism, Department of Medicine, Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul Korea
2. Division of Endocrinology and Metabolism, Department of Medicine; Gyeongsang National University School of Medicine; Jinju Korea
3. Division of Endocrinology and Metabolism, Department of Medicine; Konkuk University Medical Center, Konkuk University School of Medicine; Seoul Korea
4. Department of Medical Education; Sungkyunkwan University School of Medicine; Seoul Korea
5. Department of Pathology, Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul Korea