Zheng, Mao Dong
Wang, Nai Dong
Li, Xiao Liang
Yan, Juan
Tang, Jian Hua
Zhao, Xiu Hua
Zhang, Zhihua
Funding for this research was provided by:
the medical science research key project in HeBei province (No.ZD20140167)
Article History
Received: 3 December 2017
Accepted: 30 March 2018
First Online: 7 April 2018
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.