Funding for this research was provided by:
Natural Science Foundation of Henan Province (22180003)
Text and Data Mining valid from 2019-10-22
Received: 19 June 2019
Accepted: 14 October 2019
First Online: 22 October 2019
Ethics approval and consent to participate
: The ethics committee of the Affiliated Tumor Hospital of Zhengzhou University has approved this study.
: Not applicable.
: The authors declare that they have no competing interests. This manuscript has been read and approved by all authors and is not under consideration for publication elsewhere.