title: Meta-analysis: convenient assumptions and inconvenient truth.
authors.forename: John J
authors.initials: JJ
authors.lastname: Marini
mesh_terms: D015986:Confounding Factors, Epidemiologic; D019317:Evidence-Based Medicine / Q000379:methods; D006801:Humans; D015201:Meta-Analysis as Topic; D015983:Selection Bias; D015300:Ventilator Weaning