Pei, Xiaoting
Liu, Li
Imam, Mustapha Umar
Lu, Ming
Chen, Yanzi
Sun, Panpan
Guo, Yaxin
Xu, Yiping
Ping, Zhiguang http://orcid.org/0000-0001-8924-0761
Fu, Xiaoli
Funding for this research was provided by:
National Natural Science Foundation of China (81001280, 81202277, 81373096)
Key Research Project for Colleges and Universities in Henan Province (16A330003)
Article History
Received: 20 November 2017
Accepted: 12 April 2018
First Online: 20 April 2018
Ethics approval and consent to participate
: The protocol for the study was approved by the ethics committee of Zhengzhou University, and written consents were obtained from all the participants.
: The authors declare that they have no competing interests.
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