1. Xinjiang Medical University; The Eye Department of the First Affiliated Hospital; Xinjiang China
2. First Affiliated Hospital of Xinjiang Medical University; Eye Department; Xinjiang China China
3. Chengdu Medical College; Department of Epidemiology; Chengdu China
4. West China Hospital, Sichuan University; Chinese Clinical Trial Registry, Chinese Ethics Committee of Registering Clinical Trials; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041