title: On assessing the validity of the main diagnosis in patient data bases: the impact of aims for making diagnosis.
authors.forename: L
authors.initials: L
authors.lastname: Elffors
mesh_terms: D003933:Diagnosis; D006801:Humans; D007256:Information Systems / Q000592:standards*; D011379:Prognosis; D012042:Registries / Q000592:standards*; D012107:Research Design; D013548:Sweden