The guideline was prepared by a panel of experts based on an analysis of the results of randomized controlled trials. (sciencedaily.com)
Maternal exercise and growth in breastfed infants: a meta - analysis of randomized controlled trials. (lactationlink.com)
One 2008 study, for instance, analyzed 16 papers investigating publication bias in randomized clinical trials and found clear indications of selective publication. (sciencenews.org)