title: Clinical trial registries: more international, converging efforts are needed.
abstract: Clinical trial registries are being increasingly acknowledged worldwide. We searched for possibly trustworthy online registries that are not already included in the International Clinical Trials Registry Platform to evaluate whether other useful trial data sources exist and whether they could potentially be consulted, since the strategy search within this platform has recently been questioned. Fifty-nine registries were initially identified, and 11 of them fit the criteria applied and were analyzed for quality and usability. Four additional, potentially reliable registries were identified that researchers could exploit in order to obtain a more global view of the issue being investigated.
authors.affiliation: Department of Public Health, Laboratory for Mother and Child Health, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Via Giuseppe la Masa 19, 20156, Milan, Italy.
authors.forename: Claudia
authors.initials: C
authors.lastname: Pansieri
authors.affiliation: Department of Public Health, Laboratory for Mother and Child Health, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Via Giuseppe la Masa 19, 20156, Milan, Italy.
authors.forename: Chiara
authors.initials: C
authors.lastname: Pandolfini
authors.affiliation: Department of Public Health, Laboratory for Mother and Child Health, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Via Giuseppe la Masa 19, 20156, Milan, Italy. maurizio.bonati@marionegri.it.
authors.forename: Maurizio
authors.initials: M
authors.lastname: Bonati
mesh_terms: D022126:Access to Information; D002986:Clinical Trials as Topic / Q000379:methods*; D006801:Humans; D033181:Information Dissemination; D007391:International Cooperation; D020407:Internet; D012042:Registries; D012107:Research Design
keywords: Clinical trials as Topic; Databases; Factual; Registries; Transparency; Website usability