Lars Bruun Larsen, Department of Public Health, Research Unit of General Practice, University of Southern Denmark, J.B. Winsløws Vej 9A DK-5000, Odense, Denmark. Electronic address: lblarsen@health.sdu.dk., Denmark
Trine Thilsing, Department of Public Health, Research Unit of General Practice, University of Southern Denmark, J.B. Winsløws Vej 9A DK-5000, Odense, Denmark., Denmark
Jens Sondergaard, Department of Public Health, Research Unit of General Practice, University of Southern Denmark, J.B. Winsløws Vej 9A DK-5000, Odense, Denmark.