1. Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea.
2. Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Korea.
3. Department of Internal Medicine, Catholic University of Daegu School of Medicine, Daegu, Korea.
4. Division of Endocrinology and Metabolism, Department of Internal Medicine, University of Ulsan College of Medicine, Seoul, Korea.
5. Department of Endocrinology and Metabolism, Kyung Hee University Hospital at Gangdong, Kyung Hee University Medical Center, Seoul, Korea.
6. Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
7. Astellas Pharma Inc., Tokyo, Japan.
8. Astellas Korea Inc., Seoul, Korea.
9. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.