title: Metaanalyses - highest level of empirical evidence?
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Maier
authors.forename: Hans-Jürgen
authors.initials: HJ
authors.lastname: Möller
mesh_terms: D002986:Clinical Trials as Topic; D019317:Evidence-Based Medicine; D017408:Guidelines as Topic; D015201:Meta-Analysis as Topic