1. Department of Clinical Immunology; Aarhus University Hospital; Aarhus Denmark
2. Department of Clinical Microbiology; Aarhus University Hospital; Aarhus Denmark
3. Department of Clinical Immunology; Naestved Hospital; Naestved Denmark
4. Department of Clinical Immunology; Copenhagen University Hospital; Copenhagen Denmark
5. Epidemiology Research; Statens Serum Institut; Copenhagen Denmark
6. Department of Hematology; Copenhagen University Hospital, Rigshospitalet; Copenhagen Denmark
7. Department of Clinical Immunology; Aalborg University Hospital; Aalborg Denmark