Na An. Institute of Ophthalmology, Xi’an First Hospital (First Affiliated Hospital of Northwest University of China); Shaanxi Key Laboratory of Ophthalmology, Shaanxi Institute of Ophthalmology, Clinical Research Center for Ophthalmic Diseases of Shaanxi Province, Xi’an 710002, Shaanxi Province, China. natalieann@126.com

Supported by Shaanxi Provincial Key Research and Development Project (No.2018ZDXM-SF-056); Shaanxi Province Social Development and Technology of Research Project (No.2018SF-249); Shaanxi Province Project of Scientific Research Fund for Health (No.2016C004); Xi’an Science and Technology Project [No.2017116SF/YX010(5)]; Xi’an Science and Technology Project [No.2017116SF/YX010(6)].