[1] Peking Univ, Hlth Ctr, Sch Publ Hlth, Beijing, Peoples R China
[2] Chinese Peoples Liberat Army Gen Hosp, Med Ctr 1, Dept Nephrol, Beijing, Peoples R China
[3] Chinese Peoples Liberat Army Gen Hosp, Med Ctr 1, State Key Lab Kidney Dis, Beijing, Peoples R China
[4] Chinese Peoples Liberat Army Gen Hosp, Med Ctr 1, Natl Clin Res Ctr Kidney Dis, Beijing, Peoples R China
[5] Univ British Columbia, Dept Family Practice, Vancouver, BC, Canada
[6] Simon Fraser Univ, Fac Hlth Sci, Burnaby, BC, Canada
[7] Harvard TH Chan Sch Publ Hlth, Dept Global Hlth & Populat, Boston, MA USA