1. Department of Clinical Immunology, Odense University Hospital, Odense, Denmark;
2. Clinical Department, Faculty of Health Sciences, and
3. Clinical Pharmacology and Pharmacy, Department of Public Health, University of Southern Denmark, Odense, Denmark;
4. Biostatistics, Department of Public Health, Aarhus University, Aarhus, Denmark;
5. Department of Clinical Immunology, Aalborg University Hospital, Aalborg, Denmark;
6. Department of Clinical Immunology, Zealand University Hospital, Næstved, Denmark;
7. Department of Clinical Immunology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark; and
8. Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark