title: [Demarcation problem. Clinical trials of dietary supplements].
authors.affiliation: Andreas-Schlüter-Str. 19, 53639 Königswinter. chr.steffen@web.de
authors.forename: Christian
authors.initials: C
authors.lastname: Steffen
mesh_terms: D002784:Cholesterol / Q000378:metabolism; D002986:Clinical Trials as Topic / Q000941:ethics / Q000592:standards / Q000639:trends*; D019587:Dietary Supplements / Q000592:standards*; D055951:Functional Food; D005858:Germany; D006801:Humans; D007880:Legislation, Drug
chemical_list: D002784:Cholesterol