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Risk of bias analysis of studies included in the current review: (a) overall bias and bias of methodology, including the selection of reported results, the measurement of outcome, missing outcome data, deviations from intended interventions, and randomisation process; and (b) summary of the risk of bias and concerns [64,65,66,67,68,69,70,71,72,73,74]. Bias is ranked according to low risk (green) and some concerns (yellow).
