Funding for this research was provided by:
Key Research Project of Tianjin Health Bureau (12KG123)
Tianjin Science Fund for Distinguished Young Scholars (17JCJQJC46000)
Text and Data Mining valid from 2019-07-31
Received: 5 October 2018
Accepted: 24 July 2019
First Online: 31 July 2019
Ethics approval and consent to participate
: All procedures performed in this study have been approved by the Ethics Committee of Tianjin Eye Hospital (Registration Number TJYYLL-2016-20). All procedures performed in this study were in accordance with the ethical standards of with the Helsinki Declaration. Informed consent forms were signed by all the enrolled participants.
: The authors declare that they have no competing interests.