Funding for this research was provided by:
National Natural Science Foundation of China (81703896, 81972130, 81972107, 82072494 and 81902203)
Capital Health Research and Development of Special (2020-2-4067)
the National Key Research and Development Program of China (2017YFC0108102)
Received: 28 September 2020
Accepted: 14 January 2021
First Online: 20 January 2021
Ethics approval and consent to participate
: The Institutional Review Board of China-Japan Friendship Hospital approved this study, and the ID number of the approval was 2013-SF-1. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. All data were collected from the hospital’s image database. No participants directly participated in the study. The data in this study was de-identified upon data collection. The ethics committee approved the process and agreed not to provide written informed consent.
: Not Applicable.
: The authors declare that they have no competing interest.