1. Department of Clinical Microbiology, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark;
2. Section of General Practice and Research Unit for General Practice, Department of Public Health, University of Copenhagen, Copenhagen, Denmark;
3. Research Unit for General Practice, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark;
4. Audit Project Odense, Department of Public Health, University of Southern Denmark, Odense, Denmark