1. Department of Endocrinology and Metabolism, Ajou University School of Medicine, Suwon, Korea.
2. Department of Endocrinology and Metabolism, Myongji Hospital, Kwandong University College of Medicine, Goyang, Korea.
3. Department of Surgery, Ajou University School of Medicine, Suwon, Korea.
4. Department of Hematology-Oncology, Ajou University School of Medicine, Suwon, Korea.