Funding for this research was provided by:
National Natural Science Foundation of China (81870633)
Received: 16 August 2019
Accepted: 23 December 2019
First Online: 30 December 2019
Ethics approval and consent to participate
: This study adhered to the tenets of the Declaration of Helsinki and was approved by the Ethics Committee of Zhongshan Ophthalmic Center of Sun Yat-sen University. All patients provided written consent to participate in this study.
: Not applicable.
: The authors declare that they have no competing interests.