Figures & data
Figure 1 PRISMA 2009 flow diagram for selection of the studies.
Abbreviation: PRISMA, Preferred Reporting Items for Systematic Reviews and Meta-Analyses.
![Figure 1 PRISMA 2009 flow diagram for selection of the studies.](/cms/asset/864be9f8-0076-4a89-abac-e3e66610b16f/dppa_a_163273_f0001_c.jpg)
Table 1 Characteristics of the 21 reviewed studies
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Figure 1 PRISMA 2009 flow diagram for selection of the studies.
Table 1 Characteristics of the 21 reviewed studies
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