title: [In Process Citation].
authors.affiliation: Peter Vestergaard, Aalborg, Universitetshospital, Mølleparkvej 4, 9100 Aalborg. p-vest@post4.tele.dk.
authors.forename: Peter
authors.initials: P
authors.lastname: Vestergaard
authors.forename: Jakob
authors.initials: J
authors.lastname: Starup-Linde
authors.forename: Signe Engkjær
authors.initials: SE
authors.lastname: Christensen
authors.forename: Jens Frederik
authors.initials: JF
authors.lastname: Dahlerup
authors.forename: Ulla
authors.initials: U
authors.lastname: Bartels
authors.forename: Ole
authors.initials: O
authors.lastname: Færgeman
authors.forename: Ulrik
authors.initials: U
authors.lastname: Gerdes
authors.forename: Stig
authors.initials: S
authors.lastname: Andersen