Fig. 3From: The effect of vitamin D supplementation on oxidative stress and inflammatory biomarkers in pregnant women: a systematic review and meta-analysis of clinical trialsRisk of bias assessments for studies evaluating the effect of vitamin D supplementation on the level of 25(OH)D, hs-CRP, TAC, MDA and GSH (a) and the percentages of low risk of bias (green), some concerns (yellow) and high risk of bias (red) for each domain of Cochrane risk of bias assessment tool (b)Back to article page