1 Department of Ophthalmology, Affiliated Hospital of Inner Mongolia University for the Nationalities, No. 1742, HuoLinHe Street, Tongliao, Neimenggu 028050, China. Electronic address: qiu_lizhang@126.com.
2 Department of Ophthalmology, Tongliao Hospital, No. 668, KeErQin Street, Tongliao, Neimenggu 028000, China.
3 Department of Ophthalmology, Affiliated Hospital of Inner Mongolia University for the Nationalities, No. 1742, HuoLinHe Street, Tongliao, Neimenggu 028050, China.