Funding for this research was provided by:
National Natural Science Foundation of China (81573243, 21806146)
the Foundation of National Key Program of Research and Development of China (2016YFC0900803)
Henan Provincial Science Fund for Distinguished Young Scholars (164100510021)
Science and Technology Innovation Talents Support Plan of Henan Province Colleges and Universities (14HASTIT035)
High-level Personnel Special Support Project of Zhengzhou University (ZDGD13001)
Text and Data Mining valid from 2020-03-04
Received: 2 December 2019
Accepted: 20 February 2020
First Online: 4 March 2020
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of “Zhengzhou University Life Science Ethics Committee” and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Ethic approval code:  MEC (S128). Informed consent obtained was written from all individual participants included in the study.
: This manuscript does not contain data from any individual person. Consent for publication is “not applicable.”
: Huiling Tian, Jun Pan, Dou Qiao, Xiaokang Dong, Ruiying Li, Yikang Wang, Runqi Tu, Tanko Abdulai, Xiaotian Liu, Jian Hou, Gongyuan Zhang and Chongjian Wang declare that they have no competing interests.