Gong, Song
Xu, Weihua http://orcid.org/0000-0002-2570-5897
Wang, Ruoyu
Wang, Zijian
Wang, Bo
Han, Lizhi
Chen, Guo
Article History
Received: 4 June 2018
Accepted: 19 October 2018
First Online: 30 October 2018
Compliance with ethical standards
:
: No benefits or funds were received in support of this study.
: There were no ethical approval, because this study was a meta-analysis based on the data of previously published studies.