Funding for this research was provided by:
Taishan Scholar Foundation of Shandong Province (tsqn201812149)
Academic promotion program of Shandong First Medical University (2019RC004)
Received: 18 May 2021
Accepted: 19 June 2021
First Online: 8 September 2021
: This study was approved by the ethics committee of Shandong Cancer Hospital and Institute. All included patients in this study offered written informed consent.
: All authors give their consent to publish this manuscript.
: The authors declare that there is no competing interests.