[1] Beijing Univ Chinese Med, Sch Clin Med, Beijing, Peoples R China
[2] Capital Med Univ, Beijing Anzhen Hosp, Dept Ophthalmol, Beijing, Peoples R China
[3] Beijing Univ Chinese Med, Dongfang Hosp, Dept Rheumatol, Beijing, Peoples R China
[4] Beijing Univ Chinese Med, Fangshan Hosp, Dept Rheumatol, Beijing, Peoples R China