1. Hainan Eye Hospital, Zhongshan Ophthalmic Center; Hainan Provincial Key Laboratory of Ophthalmology; Haikou Hainan Province China
2. Johns Hopkins Bloomberg School of Public Health; Health Policy and Management; 624 N. Broadway St Baltimore Maryland USA 21205
3. Feinberg School of Medicine, Northwestern University; Department of Neurological Surgery; 303 E Superior Street Chicago Illinois USA 60611