The PRISMA protocol was used and the literature search was performed on Pubmed, Scopus, Cochrane Library and Web of Science up to March 13, 2020. 
Pubmed
The PRISMA protocol was used and the literature search was performed on Pubmed, Scopus, Cochrane Library and Web of Science up to March 13, 2020. 
Scopus
The PRISMA protocol was used and the literature search was performed on Pubmed, Scopus, Cochrane Library and Web of Science up to March 13, 2020. 
Cochrane Library
The PRISMA protocol was used and the literature search was performed on Pubmed, Scopus, Cochrane Library and Web of Science up to March 13, 2020. 
Web of Science