1. Microbiological Surveillance and Research, Statens Serum Institut, Copenhagen, Denmark
2. Department of Clinical Microbiology, Slagelse Hospital, Slagelse, Denmark
3. Department of Cardiology, Rigshospitalet, Copenhagen, Denmark
4. Department of Clinical Microbiology, Rigshospitalet, Copenhagen, Denmark
5. Department of Clinical Microbiology, Odense University Hospital, Odense, Denmark