Fig. 4
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13052-015-0199-2/MediaObjects/13052_2015_199_Fig4_HTML.gif)
Forest plot showing the association between probiotics and necrotizing enterocolitis in the studies which used a single-strain product containing Lactobacilli ((4a). L. reuteri; (4b). L. GG; (4c). pooled analysis of all the studies using Lactobacilli). M-H: Mantel-Haenszel method