Funding for this research was provided by:
Grant for Key Disciplinary Project of Clinical Medicine under the Guangdong High-level University Development Program (002-18119101)
Article History
Received: 15 July 2019
Accepted: 18 November 2019
First Online: 2 December 2019
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the Institutional Review Board of Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong and with the 1964 Helsinki Declaration and its later amendments.
: Informed consent was obtained from all individual participants included in the study.