[1] North Sichuan Med Coll, Affiliated Hosp, Nanchong 637000, Sichuan, Peoples R China
[2] North Sichuan Med Coll, Affiliated Hosp, Dept Geriatr, Nanchong 637000, Sichuan, Peoples R China
[3] North Sichuan Med Coll, Affiliated Hosp, Dept Rheumatol & Immunol, Nanchong 637000, Sichuan, Peoples R China