[1] Presbyterian Med Ctr, Div Nephrol, Dept Internal Med, Jeonju, South Korea
[2] Gyeongsang Natl Univ, Div Nephrol, Dept Internal Med, Coll Med, Jinju, South Korea
[3] Gyeongsang Natl Univ, Div Nephrol, Dept Internal Med, Coll Med, Chang Won, South Korea
[4] Sungkyunkwan Univ, Kangbuk Samsung Hosp, Div Nephrol, Dept Internal Me,Sch Med, Seoul, South Korea
[5] Catholic Univ Korea, Yeouido St Marys Hosp, Div Nephrol, Dept Internal Med,Coll Med, Seoul, South Korea
[6] Soonchunhyang Univ Seoul Hosp, Div Nephrol, Dept Internal Med, Seoul, South Korea
[7] Univ Ulsan, Ulsan Univ Hosp, Div Nephrol, Dept Internal Med,Coll Med, Ulsan, South Korea
[8] Soonchunhyang Univ, Div Nephrol, Dept Internal Med, Bucheon Hosp, Bucheon, South Korea
[9] Korea Univ Guro Hosp, Korea Univ, Div Nephrol, Dept Internal Med,Coll Med, Seoul, South Korea
[10] Yonsei Univ, Div Nephrol, Dept Internal Med, Wonju Coll Med, Wonju, South Korea
[11] Konyang Univ Hosp, Div Nephrol, Dept Internal Med, Daejeon, South Korea
[12] Dongguk Univ, Dept Internal Med, Sch Med, Ilsan Hosp,Div Nephrol, Goyang, South Korea
[13] Catholic Univ Korea, Daejeon St Marys Hosp, Coll Med, Div Nephrol,Dept Internal Med, Seoul, South Korea