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Forest plot of probiotic strain-specificity. Meta-analysis of probiotic strain-specificity for six different Lactobacillus probiotics for the prevention of antibiotic-associated diarrhea in adults. Meta-analysis of 22 randomized, controlled trials by sub-group of probiotic type. Abbreviations: acid, acidophilus; CI, confidence interval; helv, helveticus; ID, identification; L, Lactobacillus; rhamn, rhamnosus; RR, relative risk.
