Received: 30 June 2021
Accepted: 18 March 2022
First Online: 9 April 2022
: Our manuscripts was conducted in accordance with the Declaration of Helsinki and approved by ethics committee board of Peking Union Medical College Hospital. The fundus photographs used in this study were retrospectively obtained and deidentified. All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.