Wang, Hai
Man, Libo
Li, Guizhong
Huang, Guanglin
Liu, Ning
Article History
Received: 17 September 2015
Accepted: 17 March 2016
First Online: 31 March 2016
Change Date: 9 March 2018
Change Type: Correction
Change Details: The Editors are retracting this article [1] because post-publication peer review has identified multiple errors in the methodology of this meta-analysis, which invalidate the conclusions drawn.