[1] Inner Mongolia Univ Nationalities, Affiliated Hosp, Dept Ophthalmol, Tongliao 028000, Inner Mongolia, Peoples R China
[2] Tongliao Hosp, Dept Ophthalmol, Tongliao 028000, Inner Mongolia, Peoples R China
[3] Inner Mongolia Univ Nationalities, Affiliated Hosp, Dept Neurosurg, Tongliao 028000, Inner Mongolia, Peoples R China
[4] Jilin Univ, China Japan Union Hosp, Changchun 130000, Jilin, Peoples R China