Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Flow chart depicting the process used for study selection. A total of 1507 studies (276 from PubMed, 196 from EMBASE, 661 from CENTRAL, and 374 from SCOPUS) were detected using a systematic literature review. After eliminating duplicates, 840 references remained; eight studies were finally selected for the NMA after adopting the PICOS approach.
