1. Department of Endocrinology and Metabolism, Kyung Hee University Hospital, Seoul, Korea.
2. Department of Internal Medicine, Catholic Kwandong University College of Medicine, International St. Mary's Hospital, Incheon, Korea.
3. Department of Orthopaedic Surgery, School of Medicine, Konkuk University, Seoul, Korea.
4. Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
5. Department of Orthopaedic Surgery, College of Medicine, Chung-Ang University, Seoul, Korea.
6. College of Pharmacy and Gachon Institute of Pharmaceutical Sciences, Gachon University, Incheon, Korea.
7. Division of Endocrinology and Metabolism, Department of Internal Medicine, Inha University Hospital, Inha University School of Medicine, Incheon, Korea.
8. Department of Internal Medicine, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea.