Fig. 3From: Zinc supplementation and COVID-19 mortality: a meta-analysisRisk of bias graph and summary: review authorsā judgements about each risk of bias item presented as percentages across eligible studies. Studies that have done by Yao et al. [16] and Carlucci et al. [13] haveĀ categorized as good studies about the risk of bias based on the modified Newcastle-Ottawa Scale by the authorsāĀ judgementBack to article page