| Affiliation: | 1. Department of Clinical Immunology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark;2. Danish Headache Center, Department of Neurological Department, Copenhagen University Hospital, Glostrup, Denmark;3. Department of Clinical Immunology, Næstved Hospital, Næstved, Denmark;4. Department of Clinical Immunology, University Hospital of Aarhus, Aarhus, Denmark;5. Department of Epidemiology Research, Statens Serum Institut, Department of Haematology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark;6. Department of Clinical Immunology, Odense University Hospital, Odense, Denmark |
