1. Statens Serum Institut, Copenhagen, Denmark.
2. Department of Clinical Microbiology, Rigshospitalet, Copenhagen, Denmark.
3. Department of Clinical Microbiology, Aalborg Sygehus, Aalborg, Denmark.
4. Department of Clinical Microbiology, Herlev Hospital, Herlev, Denmark.
5. Department of Clinical Microbiology, Hillerød Sygehus, Hillerød, Denmark.
6. Department of Clinical Microbiology, Hvidovre Hospital, Hvidovre, Denmark.
7. Department of Clinical Microbiology, Vejle Hospital, Vejle, Denmark.
8. Department of Clinical Microbiology, Slagelse Sygehus, Slagelse, Denmark.
9. Department of Clinical Microbiology, Regionshospitalet Herning, Herning, Denmark.
10. Department of Clinical Microbiology, Aarhus University Hospital, Aarhus, Denmark.
11. Department of Clinical Microbiology, Sydvestjysk Sygehus Esbjerg, Esbjerg, Denmark.
12. Department of Clinical Microbiology, Regionshospitalet Viborg, Viborg, Denmark.
13. Department of Clinical Microbiology, Odense University Hospital, Odense, Denmark.