1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Biomedical Research Institute, Pusan National University Hospital, Busan, Korea.
2. Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
3. Department of Clinical Epidemiology and Biostatistics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
4. Department of Radiology, and Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
5. Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.