Li, Zhongxin
Zhou, Jingjing
Li, Yan
Yang, Fan
Lian, Xiaoying
Liu, Wenhu http://orcid.org/0000-0002-0064-0986
Article History
Received: 18 December 2018
Accepted: 10 April 2019
First Online: 22 April 2019
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 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.