1 Division of Nephrology, Department of Internal Medicine, Konyang University Hospital, Daejeon, Republic of Korea.
2 Konyang University Myunggok Medical Research Institute, Daejeon, Republic of Korea.
3 Division of Nephrology, Department of Internal Medicine, Hallym University Medical Center, Chuncheon Sacred Heart Hospital, Chuncheon, Republic of Korea.
4 Division of Nephrology, Department of Internal Medicine, Gyeongsang National University Hospital, Jinju, Republic of Korea.
5 Division of Nephrology, Department of Internal Medicine, Kangbuk Samsung Hospital, Seoul, Republic of Korea.
6 Division of Nephrology, Department of Internal Medicine, Yeouido St. Mary's Hospital, Seoul, Republic of Korea.
7 Division of Nephrology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea.
8 Division of Nephrology, Department of Internal Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea.
9 Division of Nephrology, Department of Internal Medicine, Ulsan University Hospital, Ulsan, Republic of Korea.
10 Division of Nephrology, Department of Internal Medicine, Keimyung University Dongsan Hospital, Daegu, Republic of Korea.
11 Division of Nephrology, Department of Internal Medicine, Presbyterian Medical Center, Jeonju, Republic of Korea.
12 Division of Nephrology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea.
13 Division of Nephrology, Department of Internal Medicine, Korea University Guro Hospital, Seoul, Republic of Korea.
14 Division of Nephrology, Department of Internal Medicine, Yonsei University Wonju Severance Christian Hospital, Wonju, Republic of Korea.
15 Division of Nephrology, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea.
16 Division of Nephrology, Department of Internal Medicine, Dongguk University Ilsan Hospital, Goyang, Republic of Korea.
17 Division of Nephrology, Department of Internal Medicine, Daejeon St. Mary's Hospital, Daejeon, Republic of Korea.
18 Division of Nephrology, Department of Internal Medicine, Konyang University Hospital, Daejeon, Republic of Korea. hwangwm@kyuh.ac.kr.