Funding for this research was provided by:
National Natural Science Foundation of China (81902940)
Received: 28 February 2020
Accepted: 26 August 2020
First Online: 5 September 2020
Ethics approval and consent to participate
: All studies were approved by the Committee on Ethics of Second Military Medical University. Permission from Second Military Medical University’s Institutional Review Board was obtained prior to data review.
: Written informed consent was obtained from all patients for surgical treatment, pathological examinations, and further analysis according to the institutional guidelines.
: The authors declare that they have no competing interests.