Ma, Zhihong
Kong, Xianglong
Liu, Shufeng
Yin, Shuxian
Zhao, Yuehua
Liu, Chao
Lv, Zhanjun https://orcid.org/0000-0002-0580-1670
Wang, Xiufang
Funding for this research was provided by:
National Natural Science Foundation of China (30873001)
Natural Science Foundation of Hebei Province (H2013206101, C2011206043)
Department of Health of Hebei Province (20100242)
Hebei Province Science Fundation of China (USIP2016066)
Article History
Received: 11 October 2016
Accepted: 20 March 2017
First Online: 29 March 2017
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.