Feng, Guoli
Luo, Yi
Zhang, Qi
Zeng, Feng
Xu, Jie
Zhu, Jingqiang
Article History
Received: 11 July 2019
Accepted: 18 December 2019
First Online: 18 January 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All the studies included in the meta-analysis were conducted in accordance with the ethical standards of the institutional and/or national research committee, and obtained written informed consent from all participants.