Funding for this research was provided by:
National Natural Science Foundation of China (81172224)
Text and Data Mining valid from 2020-02-13
Received: 19 September 2019
Accepted: 5 February 2020
First Online: 13 February 2020
Ethics approval and consent to participate
: The study protocol was approved by the Regional Ethics Committee for Clinical Research of the Air Force Medical University. All patients have signed informed consent.
: All patients provided written informed consent for use of their medical records and tissue specimens for research purposes.
: The authors declare that they have no competing interests.