Effectiveness of probiotics on the duration of illness in healthy children and adults who develop common acute respiratory infectious conditions: a systematic review and meta-analysis.
Br J Nutr. 2014 Jul 14;112(1):41-54. doi: 10.1017/S0007114514000075. Epub 2014 Apr 29. Br J Nutr. 2014. PMID: 24780623 Free PMC article. Review.