1. Department of Internal Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Republic of Korea.
2. Department of Internal Medicine, Ewha Womans University Medical Center, Seoul, Republic of Korea.
3. Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea.
4. Department of Transplantation Surgery, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea.
5. Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
6. Department of Internal Medicine, Kyungpook National University School of Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea.
7. Department of Internal Medicine, Jeonbuk National University Medical School, Jeonju, Republic of Korea.
8. Department of Internal Medicine, Gachon University, Gil Hospital, Incheon, Republic of Korea.
9. Department of Internal Medicine, Keimyung University, Dongsan Medical Center, Daegu, Republic of Korea.
10. Department of Internal Medicine, Yonsei University College of Medicine, Severance Hospital, Seoul, Republic of Korea.