[1] Sichuan Univ, West China Hosp, Dept Geriatr, 37 Guoxue Xiang, Chengdu 610041, Sichuan, Peoples R China
[2] Sichuan Univ, West China Hosp, Natl Clin Res Ctr Geriatr, 37 Guoxue Xiang, Chengdu 610041, Sichuan, Peoples R China
[3] Univ Texas Austin, Sch Nursing, Austin, TX 78712 USA
[4] Johns Hopkins Univ, Sch Nursing, Baltimore, MD USA
[5] Hebrew Seniorlife, Hinda & Arthur Marcus Inst Aging Res, Boston, MA USA
[6] Sichuan Univ, West China Hosp, Dept Breast Surg, Chengdu, Sichuan, Peoples R China
[7] Harvard Med Sch, Beth Israel Deaconess Med Ctr, Dept Med, Boston, MA 02115 USA