title: Uses and limitations of registry and academic databases.
authors.affiliation: Hospital for Sick Children, 555 University Ave., Toronto, Ontario, Canada. bill.williams@sickkids.ca
authors.forename: William G
authors.initials: WG
authors.lastname: Williams
mesh_terms: D035843:Biomedical Research; D002309:Cardiology; D016208:Databases, Factual / Q000592:standards; D006330:Heart Defects, Congenital / Q000601:surgery; D006801:Humans; D011787:Quality of Health Care; D012042:Registries / Q000592:standards