Data was extracted from eligible studies by two review authors individually and analyzed by RevMan 5.3.



RevMan
The Cochrane Library, MEDLINE (PubMed), Scopus, and Web of Science (all databases from inception till October 28, 2018) were searched. 
MEDLINE (PubMed)
The Cochrane Library, MEDLINE (PubMed), Scopus, and Web of Science (all databases from inception till October 28, 2018) were searched. 
Scopus
The Cochrane Library, MEDLINE (PubMed), Scopus, and Web of Science (all databases from inception till October 28, 2018) were searched. 
Web of Science