Figure Legends
Figure 1. PRISMA flow diagram. The diagram shows the study selection process and provides reasons for exclusion for the records screened. PRISMA, Preferred Reporting Items for Systematic Reviews and Meta-Analyses.
Figure 2. Network diagram comparing different regional anesthesia techniques in terms of intravenous morphine equivalents (mg) in the first 24 h.
Figure 3. Forest plot for the comparison of intravenous morphine equivalents (mg) in the first 24 h. Comparison of results expressed in intravenous morphine equivalents (mg) through meand difference (MD) between subgroups.