Zhao, Shuzhi
Li, Yangding
Li, Min
Wang, Ruonan
Bi, Yanzhi
Zhang, Yajuan
Lu, Xiaoqi
Yu, Dahua
Yang, Likun
Yuan, Kai http://orcid.org/0000-0002-3098-1124
Article History
First Online: 20 June 2018
Compliance with ethical standards
:
: Informed consent was obtained from all individual participants included in the study.
: 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.
: The authors declare that they have no conflict of interest.