Funding for this research was provided by:
National Nature Science Foundation of China (No. 81874143, No. 31971192)
the Beijing Natural Science Foundation (No. 7192035)
Beijing Hospitals Authority Youth Program (QMS20201105)
Article History
Received: 30 November 2020
Accepted: 8 August 2021
First Online: 16 August 2021
Declarations
:
: The present study was a retrospective study, and all subjects provided written informed consent. The investigation project was examined and certified by the Ethics Committee of Beijing Cancer Hospital. The study was performed in accordance with the Declaration of Helsinki.
: The manuscript does not contain any individual person's data.
: The manuscript has not been presented at a talk or poster meeting. We declare that we have no financial and personal relationships with other people or organizations that could have inappropriately influenced our work, and there are no professional or other personal interests of any nature or kind in any product, service and/or company that could be construed.