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. 2020 Feb 27;9(2):100395. doi: 10.1016/j.imr.2020.02.003

Fig. 2.

Fig. 2

Methodological quality graph. (A) Risk of bias graph: authors’ assessments about each risk of bias item presented as percentages of all included studies. (b): Risk of bias summary: authors’ assessments about each risk of bias item for each included study. “+”: low risk, “?”: unclear risk, and “-”: high risk.