Zhao, Cailei
Chen, Qian
Li, Chunde
Yang, Jian
Li, Cong
Zhou, Yangyang
Liao, Jianxiang http://orcid.org/0000-0002-2514-5340
Article History
Received: 8 November 2017
Accepted: 13 March 2018
First Online: 10 April 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 or their guardians included in the study.