Funding for this research was provided by:
Plan projects from science and technology department of Henan province (172102310011)
Text and Data Mining valid from 2019-08-08
Received: 31 May 2019
Accepted: 25 July 2019
First Online: 8 August 2019
Ethics approval and consent to participate
: Ethical approval (Approval number: 2017-16125) was obtained from the Ethics Committee of the First Affiliated Hospital of Zhengzhou University. All procedures performed in studies involving human participants or animals were in accordance with the ethical standards of the institutional and national research committee. Written informed consent was obtained from all individual patients included in the study.
: Not applicable.
: The authors declare that they have no competing interests.