1. Statens Serum Institut, Copenhagen, Denmark
2. Clinical Microbiology Department, Nordsjællands Hospital, Hillerød, Denmark
3. Clinical Microbiology Department, Århus University Hospital, Skejby, Denmark
4. Clinical Microbiology Department, Odense University Hospital, Odense, Denmark
5. Clinical Microbiology Department, Rigshospitalet, Copenhagen, Denmark
6. Clinical Microbiology Department, Sygehus Lillebælt, Vejle, Denmark
7. Clinical Microbiology Department, Aalborg Sygehus Syd, Aalborg, Denmark
8. Clinical Microbiology Department, Regionshospitalet Viborg, Skive,Viborg, Denmark
9. Clinical Microbiology Department, Hvidovre Hospital, Hvidovre, Denmark