Received: 14 July 2020
Accepted: 9 September 2020
First Online: 24 September 2020
Ethics approval and consent to participate
: All the breast cancer tissue samples were collected with written informed consent in accordance with the Declaration of Helsinki and with the approval of the Ethical Committee of the Affiliated Cancer Hospital at Zhengzhou University (No. 2019188; Approve date: May 13, 2019).
: Not applicable.
: The authors declare no conflict of interest.