1. Department of Ophthalmology, Chengdu University of Traditional Chinese Madicine, Chengdu, Sichuan 610000, P.R. China
2. Department of Ophthalmology, The Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 610000, P.R. China
3. Henan Provincial People's Hospital, Henan Eye Hospital and Henan Eye Institute, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, P.R. China
4. Zhengzhou BoAi Eye, Pharyngeal, Ear, Nose and Throat Hospital, Zhengzhou, Henan 450003, P.R. China