Li, Lin
Zhang, Wenyi
Yang, Yun
Zhao, Liyuan
Zhou, Xinyao
Zhang, Jian http://orcid.org/0000-0002-7406-2816
Article History
Received: 4 October 2017
Accepted: 20 August 2018
First Online: 25 August 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All analyses were based on previous published studies, thus this article does not contain any studies with human participants performed by any of the authors.
: For this type of study, formal consent is not required.