1. Department of Clinical ImmunologyCopenhagen University Hospital Copenhagen Denmark
2. The Danish Twin RegistryUniversity of Southern Denmark Odense Denmark
3. Department of Clinical ImmunologyAarhus University Hospital Aarhus Denmark
4. Department of Epidemiology ResearchStatens Serum Institut Copenhagen Denmark
5. Department of HaematologyCopenhagen University Hospital Copenhagen Denmark
6. Department of Clinical ResearchUniversity of Southern Denmark Odense Denmark
7. Odense Patient Data Explorative Network (OPEN)Odense University Hospital Odense Denmark
8. Department of Clinical ImmunologyNæstved Hospital Næstved Denmark