title: Meta-analysis: state-of-the-science.
authors.affiliation: Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia.
authors.forename: K
authors.initials: K
authors.lastname: Dickersin
authors.forename: J A
authors.initials: JA
authors.lastname: Berlin
mesh_terms: D015982:Bias; D015201:Meta-Analysis as Topic; D015203:Reproducibility of Results; D012196:Review Literature as Topic; D013223:Statistics as Topic