1. Julius Center for Health Sciences and Primary Care, University Medical Center, the Netherlands
2. Department of Neurobiology, Care Science and Society, Karolinska Institutet, Sweden
3. Functional Area of Emergency Medicine, Karolinska University Hospital, Sweden
4. Department of Internal Medicine, Karolinska Institutet, Stockholm, Sweden
5. NIVEL (Netherlands Institute for Health Services Research), the Netherlands
6. University Library, Karolinska Institutet, Sweden
7. Department of General Practice and Elderly Care Medicine, VU University Medical Center, the Netherlands
8. Clinic of Social and Family Medicine, University of Crete, Greece
9. Research Unit for General Practice, University of Southern Denmark, Denmark
10. Department of General Practice, Charles University, Czech Republic
11. Department of Medical Sciences, Uppsala University, Sweden