[1] Fudan Univ, Zhongshan Hosp, Dept Nephrol, Shanghai, Peoples R China
[2] Shanghai Med Ctr Kidney, Shanghai, Peoples R China
[3] Shanghai Inst Kidney & Dialysis, 136 Med Coll Rd, Shanghai 200032, Peoples R China
[4] Shanghai Key Lab Kidney & Blood Purificat, Shanghai, Peoples R China
[5] Hemodialysis Qual Control Ctr Shanghai, Shanghai, Peoples R China