Probiotics for Preventing Upper Respiratory Tract Infections in Adults: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

<div>Risk of bias assessment for the included studies: (a) a summary for the risk of bias; (b) a graphic view for the risk of bias.</div>

Evidence-Based Complementary and Alternative Medicine

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Figure 2: Probiotics for Preventing Upper Respiratory Tract Infections in Adults: A Systematic Review and Meta-Analysis of Randomized Controlled Trials 

Figure 2 | Probiotics for Preventing Upper Respiratory Tract Infections in Adults: A Systematic Review and Meta-Analysis of Randomized Controlled Trials 