title: Introduction: the quality of the medical evidence: is it good enough?
authors.affiliation: Department of Epidemiology, University of Maryland, Baltimore 21210, USA.
authors.forename: K
authors.initials: K
authors.lastname: Dickersin
authors.forename: A
authors.initials: A
authors.lastname: Herxheimer
mesh_terms: D015982:Bias; D012106:Research / Q000592:standards*; D012107:Research Design; D012109:Research Support as Topic; D016896:Treatment Outcome