[1] Sichuan Univ, West China Hosp, West China Sch Nursing, Dept Cardiol, Chengdu, Peoples R China
[2] Sichuan Univ, West China Hosp, Lib & Informat Ctr, Dept Sci & Technol, Chengdu, Peoples R China
[3] Sichuan Univ, West China Hosp, West China Sch Nursing, Dept Nursing, Chengdu, Peoples R China
[4] Sichuan Univ, West China Hosp, 37 Guo Xue Lane, Chengdu 610041, Sichuan, Peoples R China