[1] China Med Univ, Dept Gerotol, Shengjing Affiliated Hosp, Shenyang, Peoples R China
[2] China Med Univ, Dept Geriatr, Shengjing Affiliated Hosp, Shenyang, Peoples R China
[3] China Med Univ, Dept Gerontol & Geriatr, Affiliated Hosp 1, Shenyang, Peoples R China
[4] Gen Hosp Chinese PLA, Dept Kidney, Beijing, Peoples R China