1. Department of Clinical Immunology; Copenhagen University Hospital; Copenhagen Denmark
2. Department of Clinical Immunology; Naestved Hospital; Naestved Denmark
3. America's Blood Centers; Washington, DC Washington, DC
4. Department of Clinical Immunology; Aalborg University Hospital; Aalborg Denmark
5. Department of Clinical Immunology; Odense University Hospital; Odense Denmark
6. Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
7. Department of Cardiology; Södersjukhuset; Stockholm Sweden
8. Department of Epidemiology Research; Statens Serum Institut; Copenhagen Denmark
9. Department of Clinical Immunology; Aarhus University Hospital; Aarhus Denmark
10. Department of Haematology; Copenhagen University Hospital; Copenhagen Denmark