[1] West China Med Sch, Dept Med Informat, Chengdu, Peoples R China
[2] Sichuan Univ, West China Hosp, Dept Otolaryngol Head & Neck Surg, Chengdu, Sichuan, Peoples R China
[3] Sichuan Univ, West China Hosp Stomatol, Dept Nursing, Chengdu, Sichuan, Peoples R China
[4] Sichuan Univ, West China Hosp, West China Sch Nursing, Dept Nursing, Chengdu 610041, Sichuan, Peoples R China
[5] Vanderbilt Univ, Med Ctr, Dept Biomed Informat, Nashville, TN USA
[6] West China Hosp, West China Med Sch, Dept Med Informat, 37 Guoxue Rd, Chengdu 610041, Sichuan, Peoples R China