Funding for this research was provided by:
Zhejiang Major Science and Technology Project (2019C03058)
Zhejiang Medicine and Health Science and Technology Program (2019KY324)
Received: 14 May 2020
Accepted: 17 November 2020
First Online: 27 November 2020
Ethics approval and consent to participate
: This retrospective study was approved by the ethics committee of Zhejiang Cancer Hospital, University of Chinese Academy of Sciences; the informed consent requirement was waived.
: Not applicable.
: The authors declare that they have no conflict of interest.