Funding for this research was provided by:
National Key R&D Program of China (2017YFC0112400, 2017YFC0112402)
National Natural Science Foundation of China (81670826)
Science and Technology Planning Project of Guangdong Province (2016A020215093)
Research Program of Sun Yat-Sen University (3030901010080)
Text and Data Mining valid from 2018-12-01
Received: 15 June 2018
Accepted: 18 November 2018
First Online: 4 December 2018
Ethics approval and consent to participate
: All research methods are in accordance with the tenets of the Declaration of Helsinki and approved by the ethics committee board of the Zhongshan Ophthalmic Center, Sun Yat-sen University, China. All subjects were recruited voluntarily and were informed about the purposes, methods, and the potential risks of the study. A signed consent form was obtained from each volunteer.
: All study subjects gave their informed consent.
: The authors declare that they have no competing interests.