title: [The main question is still unanswered].
authors.affiliation: kjell.lindstrom@lj.se
authors.forename: Kjell
authors.initials: K
authors.lastname: Lindström
authors.forename: Sven
authors.initials: S
authors.lastname: Engström
mesh_terms: D016208:Databases, Factual; D006291:Health Policy; D006801:Humans; D011785:Quality Assurance, Health Care; D012042:Registries; D013548:Sweden