Funding for this research was provided by:
Natural Science Foundation of Hunan Province (2018JJ2001)
Research Fund Project of AIER Eye Hospital Group (AF1601D5)
Article History
Received: 29 December 2018
Accepted: 22 May 2019
First Online: 29 May 2019
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.