Funding for this research was provided by:
National Natural Science Foundation of China (No. 81371043, No. 81800814)
Chongqing Key Laboratory of Ophthalmology (CSTC, 2008CA5003)
Chongqing Science & Technology Platform and Base Construction Program (cstc2014ptsy10002)
Text and Data Mining valid from 2019-07-23
Received: 14 January 2019
Accepted: 18 July 2019
First Online: 23 July 2019
Ethics approval and consent to participate
: This study was approved by the local institutional review board of the First Affiliated Hospital of Chongqing Medical University, and followed the statements of the Declaration of Helsinki. Written consents were obtained from all the recruited patients.
: Not applicable.
: The authors declare that they have no competing interests.