title: [In Process Citation].
authors.affiliation: Institut for Folkesundhed, Aarhus Universitet, P.P. Ørumsgade 9-11, 8000 Aarhus C. claus.vinther@stab.rm.dk.
authors.forename: Claus Vinther
authors.initials: CV
authors.lastname: Nielsen
authors.forename: Henning
authors.initials: H
authors.lastname: Langberg
authors.forename: Jørgen Feldbæk
authors.initials: JF
authors.lastname: Nielsen
authors.forename: Fin
authors.initials: F
authors.lastname: Biering-Sørensen