Wang, Zhen
Xu, Haoying
Liu, Yukun
Funding for this research was provided by:
National Natural Science Foundation of China (71302129)
Article History
Received: 29 April 2016
Accepted: 13 October 2016
First Online: 20 October 2016
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in this study were in accordance with the ethical standards of the Institutional 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 this study.