Wei, Zhenhong
Zhang, Xiaoping
Wei, Chaojun
Yao, Liang
Li, Yonghong
Zhang, Xiaojing
Xu, Hui
Jia, Yanjuan
Guo, Rui
Wu, Yu
Yang, Kehu
Gao, Xiaoling http://orcid.org/0000-0002-5466-3200
Funding for this research was provided by:
the National Natural Science Foundation (81360264)
the National Natural Science Foundation (31360508)
the Health Industry Research Project of Gansu Province (GSWSKY2017-16)
Article History
Received: 12 November 2017
Accepted: 10 July 2019
First Online: 8 August 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.