Gao, Xin
Zhao, Chenglong
He, Shaohui
Fan, Tianqi
Xu, Wei
Yang, Cheng
Liu, Tielong
Xiao, Jianru http://orcid.org/0000-0003-3779-9752
Article History
Received: 10 June 2017
Accepted: 24 December 2017
First Online: 18 January 2018
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.