1. Department of Public Health, Research Unit of General Practice, University of Southern Denmark, Odense C, Denmark;
2. Health Services Research Unit, Lillebaelt Hospital, and Institute of Regional Health Services Research, University of Southern Denmark, Vejle, Denmark;
3. Department of Public Health, Section for General Practice, University of Copenhagen, København K, Denmark;
4. Department of Public Health, The Research Unit for General Practice, Aarhus University, Aarhus C, Denmark;
5. Department of Psychology, University of Southern Denmark, Odense M Denmark;
6. The Danish Knowledge Centre for Rehabilitation and Palliative Care (REHPA), National Institute of Public Health, University of Southern Denmark, København K, Denmark