title: Clinical trial registration: a step forward in providing transparency for the positive and negative results of clinical trials.
authors.forename: Jeffrey P
authors.initials: JP
authors.lastname: Callen
authors.forename: June
authors.initials: J
authors.lastname: Robinson
mesh_terms: D002986:Clinical Trials as Topic; D030881:Disclosure; D035081:Editorial Policies; D010506:Periodicals as Topic / Q000592:standards; D012042:Registries; D016896:Treatment Outcome