title: Erratum.
abstract: [This corrects the article on p. in vol. , PMID: 16896390.].
authors.affiliation: Department of Health Sciences, Sub-Division Care Science, University of Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands.
authors.forename: Berrie
authors.initials: B
authors.lastname: Middel
authors.forename: Eric
authors.initials: E
authors.lastname: van Sonderen