title: Meta-analysis based on standardized effects is unreliable.
authors.forename: Peter
authors.initials: P
authors.lastname: Cummings
mesh_terms: D015987:Effect Modifier, Epidemiologic; D006801:Humans; D015201:Meta-Analysis as Topic; D015203:Reproducibility of Results; D012107:Research Design / Q000592:standards; D013223:Statistics as Topic / Q000592:standards