1. Department of Dermatology Faculty of Health and Medical Sciences Zealand University Hospital University of Copenhagen Copenhagen Denmark
2. Department of Clinical Immunology Copenhagen University Hospital Rigshospitalet Copenhagen Denmark
3. Department of Clinical Immunology Aarhus University Hospital Aarhus Denmark
4. Department of Clinical Immunology Aalborg University Hospital Aalborg Denmark
5. Department of Clinical Immunology Odense University Hospital Odense Denmark
6. Department of Epidemiology Research Statens Serum Institut Copenhagen Denmark
7. Department of Clinical Immunology Naestved Hospital Naestved Denmark