Qin, Le
Gu, ShengJia
Chen, ChiHua
Zhang, Huan
Zhu, ZhenBin
Chen, XingBiao
Han, Qun
Yan, FuHua
Yang, WenJie
Article History
Received: 28 August 2018
Revised: 11 December 2018
Accepted: 19 December 2018
First Online: 21 January 2019
Compliance with ethical standards
:
: The scientific guarantor of this publication is WenJie Yang.
: The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.
: No complex statistical methods were necessary for this paper.
: Written informed consent was waived by the Institutional Review Board.
: Institutional Review Board approval was obtained.
: • retrospective• cross-sectional study• performed at one institution