Text and Data Mining valid from 2020-02-22
Received: 27 August 2019
Accepted: 6 February 2020
First Online: 22 February 2020
Ethics approval and consent to participate
: All patients were informed of the purpose of the study as well as the procedures and voluntarily agreed to provide tissue. Written consent was obtained from all participants, and all protocols were approved by the Ethics Committee of Xijing Hospital, which is affiliated with the Air Force Medical University.
: Not applicable.
: The authors declare that this research was conducted without any commercial or financial relationships and that no conflict of interest exists.