Wang, Chunhong
Liao, Yuliang
Chen, Haibin
Zhen, Xin
Li, Jianhong
Xu, Yikai
Zhou, Linghong
Article History
Received: 29 December 2017
Accepted: 22 March 2018
First Online: 26 March 2018
Compliance with ethical standards
:
: The 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/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.