1. Department of Anesthesiology and Intensive CareSahlgrenska Academy at University of Göteborg Göteborg Sweden
2. Department of Clinical Immunology and Transfusion MedicineKarolinska University Hospital Stockholm Sweden
3. Department of Clinical ImmunologyNæstved Hospital Næstved Denmark
4. Department of Clinical ImmunologyAalborg University Hospital Aalborg Denmark
5. Department of Epidemiology ResearchStatens Serum Institut Copenhagen Denmark
6. Department of HaematologyCopenhagen University Hospital Copenhagen Denmark
7. Department of Medicine, Solna, Clinical Epidemiology UnitKarolinska Institutet Stockholm Sweden
8. Department of CardiologySödersjukhuset Stockholm Sweden