Funding for this research was provided by:
Sichuan Provincial Health Research Project of the Sichuan Provincial Health Committee (NO. 19PJ142)
Science and technology department of Sichuan Province 2020 research project (NO. 2020JDRC0121, NO. 2020YFS0411)
Received: 28 August 2020
Accepted: 1 October 2020
First Online: 16 October 2020
Ethics approval and consent to participate
: All participants gave their written informed consent at baseline. This study was approved by the Sichuan Cancer Hospital Ethics Committee, and the project number was IIT2019007.
: Not applicable.
: The authors declare that they have no competing interests.