title: Why certain systematic reviews reach uncertain conclusions.
authors.affiliation: MRC Social and Public Health Sciences Unit, University of Glasgow, Glasgow G12 8RZ. mark@msoc.mrc.gla.ac.uk
authors.forename: Mark
authors.initials: M
authors.lastname: Petticrew
mesh_terms: D005069:Evaluation Studies as Topic; D019317:Evidence-Based Medicine; D006801:Humans; D017063:Outcome Assessment, Health Care; D011364:Professional Practice; D011634:Public Health; D011640:Public Policy; D012196:Review Literature as Topic