Funding for this research was provided by:
National Natural Science Foundation of China (81702558)
Received: 1 March 2020
Accepted: 28 July 2020
First Online: 8 August 2020
Ethics approval and consent to participate
: The study was approved by the Fudan University Shanghai Cancer Center review board and the requirement for written informed consent was waived due to its retrospective design.
: Not applicable.
: The authors declare that they have no competing interests.