[1] North Sichuan Med Coll, Affiliated Hosp, Dept Rheumatol & Immunol, Nanchong 637000, Sichuan, Peoples R China
[2] Sichuan Med Coll, Grad Sch North, Dept Clin Med, Nanchong 637000, Sichuan, Peoples R China
[3] North Sichuan Med Coll, Affiliated Hosp, Dept Rheumatol & Immunol, 1 Maoyuannan Rd, Nanchong 637000, Sichuan, Peoples R China