1. Department of Microbiology & Infection Control, Statens Serum Institut, Copenhagen, Denmark;
2. Department of Clinical Microbiology, Hvidovre University Hospital, Hvidovre, Denmark;
3. Department of Clinical Microbiology, Aarhus University Hospital, Aarhus N, Denmark;
4. Department of Biomedicine, Health, Aarhus University, Aarhus C, Denmark