1. Research Unit for General Practice, University of Southern Denmark, JB Winsløws Vej 9A, 5000 Odense C, Denmark
2. Danish Quality Unit for General Practice, JB Winsløws Vej 9A, 5000 Odense C, Denmark
3. General Practitioners Lærkevej, Lærkevej 14, 5450 Otterup, Denmark
4. Department of Community Medicine, University of Tromsø, The Arctic University of Norway, 9037 Tromsø, Norway