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  Indian J Med Microbiol
 

Figure 2: The assessment of bias risk of included studies. (a) Bias risk summary. Bias risk was classified as low (+), unclear (?), or high (−). (b) Bias risk graph. Reviewing authors' judgements about the bias risk of each item, and they were shown as percentages across all included studies

Figure 2: The assessment of bias risk of included studies. (a) Bias risk summary. Bias risk was classified as low (+), unclear (?), or high (−). (b) Bias risk graph. Reviewing authors' judgements about the bias risk of each item, and they were shown as percentages across all included studies