1. Division of Endocrinology; Korea University Anam Hospital; Seoul Korea
2. Department of Internal Medicine; Chungnam National University Hospital; Daejeon Korea
3. Division of Endocrinology; Department of Internal Medicine; Catholic University of Daegu School of Medicine; Daegu Korea
4. Division of Endocrinology; Department of Internal Medicine; Hallym University Kangdong Sacred Heart Hospital; Seoul Korea
5. Division of Endocrinology and Metabolism; Department of Internal Medicine; Chonbuk National University Medical School; Jeonju Korea
6. Division of Endocrinology & Metabolism; Department of Internal Medicine; Inha University Incheon; Incheon Korea
7. Division of Endocrinology and Metabolism; Department of Internal Medicine; Pusan National University Hospital; Busan Korea