1. Department of Clinical Microbiology, Copenhagen University Hospital—Herlev and Gentofte, 2730 Herlev, Denmark
2. The Research Unit for General Practice and Section of General Practice, Department of Public Health, University of Copenhagen, 1014 Copenhagen, Denmark
3. Department of Clinical Microbiology, Copenhagen University Hospital—Hvidovre and Amager, 2650 Hvidovre, Denmark
4. Department of Clinical Medicine, University of Copenhagen, 2200 Copenhagen, Denmark