Li, Li
Ma, Yi
Shang, Xiao-ming
Hong, Ye
Wang, Jian-hui
Tan, Zheng
Wang, Ya-jun
Geng, Xue-bin
Article History
Received: 24 October 2017
Accepted: 27 January 2018
First Online: 6 February 2018
Compliance with ethical standards
:
: The authors declare no funding source or conflict of interest.
: The study protocol was approved by the Ethics Committee of the Tangshan Affiliated Clinical Hospital of Hebei Medical University.
: Consents of both groups were taken for participations in study.