Funding for this research was provided by:
the Non-profit Central Research Institute Fund of Chinese Academy of Medical Sciences (2018PT32029)
the National Natural Science Foundation of China (grant no. 81570195)
the Beijing Natural Science Foundation (grant no. 7142130)
the Specialized Research Fund for the Doctoral Program of Higher Education (grant no. 2013110611000)
the Peking Union Medical College New Star (2011, for J. Li)
Received: 19 November 2019
Accepted: 4 May 2020
First Online: 19 May 2020
Ethics approval and consent to participate
: The protocol of this study was approved by the Institutional Review Board of Peking Union Medical College Hospital. All the patients were informed about the purpose and treatment procedure, and written informed consents were obtained. All procedures conformed to the tenets of the Declaration of Helsinki.
: Consents for publication of patients’ individual fundus photography (displayed in Fig. InternalRef removed and Fig. InternalRef removed) were all obtained from them.
: All authors have completed the ICMJE uniform disclosure form at ExternalRef removed and declared: supports from organizations for the submitted work were stated in Funding part; no financial relationships with any organization that might have an interest in the submitted work in the previous three years, no other relationships or activities that could appear to have influenced the submitted work.