Author information: (1)Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea. (2)Department of Nephrology, Seongnam Citizens Medical Center, Seongnam, Republic of Korea. (3)Department of Internal Medicine, Gil Medical Center, Gachon University College of Medicine, Inchon, Republic of Korea. (4)Division of Nephrology, Medicine, Maryknoll Medical Center, Busan, Republic of Korea. (5)Division of Nephrology, Department of Internal Medicine, Pusan National University School of Medicine, Busan, Republic of Korea. (6)Department of Internal Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Republic of Korea. (7)Medical Research Collaborating Center, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea. (8)Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea. (9)Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea. (10)Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea. (11)Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea. (12)Department of Internal Medicine, Inje University Busan Paik Hospital, Busan, Republic of Korea. (13)Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Republic of Korea. (14)Department of Surgery, Chonnam National University Medical School, Gwangju, Republic of Korea. (15)Department of Internal Medicine, Jeonbuk National University Medical School, Jeonju, Republic of Korea. (16)Department of Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea. (17)Transplantation Research Institute, Medical Research Center, Seoul National University College of Medicine, Seoul, Republic of Korea. (18)Korean Organ Transplantation Registry Foundation, 3rd Floor, Myeongryun-gil 22, Jongno-gu, Seoul, Republic of Korea. (19)Laboratory of Transplantation Immunology, Division of Nephrology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Room 336, 3rd Floor, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea. jcyjs@yuhs.ac.