Received: 19 March 2020
Accepted: 18 June 2020
First Online: 30 June 2020
Ethics approval and consent to participate
: Approval for the study was obtained from the Ethics Committee of Jinan Zhangqiu District Hospital of TCM (Jinan, China). Informed consent was obtained from all the patients whose tissues were used in this study.
: Not applicable.
: The authors declare that they have no competing interests.