1. Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
2. Department of Endocrinology and Metabolism, National Police Hospital, Seoul, Republic of Korea.
3. Department of Endocrinology and Metabolism, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
4. Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
5. Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.