1. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
2. Hematology Center, Karolinska University Hospital, Stockholm, Sweden
3. Department of Clinical Immunology, the Blood Bank, Rigshospitalet, Copenhagen, Denmark
4. Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
5. Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark
6. Section of Cardiothoracic Surgery, Karolinska University Hospital, Stockholm, Sweden
7. Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
8. Department of Emergency Medicine, Karolinska University Hospital, Huddinge, Stockholm, Sweden
9. Department of Internal Medicine, Solna, Karolinska Institutet, Stockholm, Sweden
10. Department of Hematology, Copenhagen University Hospital, Copenhagen, Denmark