1. Department of Social Medicine Aalborg University Hospital Aalborg Denmark
2. Danish Center for Clinical Health Services Research, Department of Clinical Medicine Aalborg University Aalborg Denmark
3. Unit of Clinical Biostatistics Aalborg University Hospital Aalborg Denmark
4. Public Health and Epidemiology Group, Department of Health Science and Technology Aalborg University Aalborg Denmark
5. Department of Clinical Medicine Aalborg University Aalborg Denmark
6. Center for General Practice Aalborg University Aalborg Denmark