title: A pitfall in the meta-analysis of hazard ratios.
authors.affiliation: Deutsches Krebsforschungszentrum, Institut für Epidemiologie und Biometrie, Heidelberg, West Germany.
authors.forename: U R
authors.initials: UR
authors.lastname: Abel
authors.forename: L
authors.initials: L
authors.lastname: Edler
mesh_terms: D002986:Clinical Trials as Topic; D006801:Humans; D008433:Mathematics; D012107:Research Design; D012306:Risk