Funding for this research was provided by:
Natural Science Foundation of Tianjin City (18JCZDJC32600)
National Natural Science Foundation of China (81602026)
863 plans sub-topics (2015AA021107)
Received: 21 December 2019
Accepted: 27 May 2020
First Online: 9 June 2020
Ethics approval and consent to participate
: The present study was conducted in accordance with the Declaration of Helsinki. Study has been granted Tianjin Medical University Cancer Institute and Hospital ethics committee approval prior to commencing. All participants have informed consent.
: Not applicable.
: The authors declare that they have no competing interests.