Funding for this research was provided by:
Xiaofang Zhang (No 81502279)
Received: 2 July 2020
Accepted: 10 August 2020
First Online: 26 August 2020
Ethics approval and consent to participate
: All tissue samples from patients were collected and protocols were performed according to the procedures approved by the Research Ethics Committee of Shandong Medical University. All patients provided informed consent.
: The authors declare that they have no competing interests.