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. 2022 Jun 14;13:913436. doi: 10.3389/fmicb.2022.913436

Figure 1.

Figure 1

Study flow chart. *The number of studies included in the meta-analysis is higher than the number of studies included in the systematic review because certain studies included different treatment groups that were meta-analyzed separately (i.e., we considered as many study groups/comparisons as treatment arms).