Yan, Jue
Ren, Yangling
Zhou, Zhongliang
Xu, Tiange
Wang, Xiao
Du, Leilei
Si, Yafei
Funding for this research was provided by:
Project of Shaanxi Social Science Foundation (2017S024)
Research Program of Shaanxi Soft Science (2015KRM117)
National Program for Support of Top-notch Young Professionals and China Medical Board (15–227)
Article History
Received: 5 June 2018
Accepted: 11 September 2018
First Online: 19 September 2018
Ethics approval and consent to participate
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: The authors declare that they have no competing interests.
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