Yang, Hong-ying
Liang, Lin-lin
Zhang, Can
Wang, Xue-bing
Niu, Pan-pan
Wang, Xiang-yang
Article History
First Online: 14 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.
: Informed consent was obtained from all individual participants included in the study.