title: The risk of bias from omitted research.
authors.forename: S
authors.initials: S
authors.lastname: Garattini
authors.forename: A
authors.initials: A
authors.lastname: Liberati
mesh_terms: D019317:Evidence-Based Medicine / Q000379:methods / Q000592:standards*; D006302:Health Services Research / Q000592:standards*; D006801:Humans; D012107:Research Design; D012196:Review Literature as Topic; D015983:Selection Bias