Figure 1
From: Evidence-based guidelines for use of probiotics in preterm neonates
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1741-7015-9-92/MediaObjects/12916_2011_Article_438_Fig1_HTML.jpg)
Designations of levels of evidence. Figure from Merlin et al. BMC Medical Research Methodology 2009: 34, doi:10.1186/1471-2288-9-34.
From: Evidence-based guidelines for use of probiotics in preterm neonates
Designations of levels of evidence. Figure from Merlin et al. BMC Medical Research Methodology 2009: 34, doi:10.1186/1471-2288-9-34.