Reporting of financial and non-financial conflicts of interest by authors of systematic reviews: a methodological survey.
Maram B HakoumSirine AnoutiMounir Al-GibbawiElias A Abou-JaoudeDivina Justina HasbaniLuciane Cruz LopesArnav AgarwalGordon GuyattElie A AklPublished in: BMJ open (2016)
Although close to half of the published systematic reviews report that authors (typically many) have conflicts of interest, more than half report that they do not. Authors reported individual conflicts of interest more frequently than institutional and non-financial conflicts of interest.