1. Center for Clinical Transfusion Research Sanquin Research Leidenthe Netherlands
2. Department of Haematology Leiden University Medical Center Leidenthe Netherlands
3. Department of Clinical Epidemiology Leiden University Medical Center Leidenthe Netherlands
4. Department of Haematology Radboud University Medical Center Nijmegenthe Netherlands
5. Department of Immunohaematology Diagnostics Sanquin Amsterdamthe Netherlands
6. Central Diagnostic Laboratory University Medical Center Utrecht Utrechtthe Netherlands
7. Department of Clinical Chemistry and Haematology Catharina Hospital Eindhoventhe Netherlands
8. Department of Clinical Chemistry Amsterdam University Medical Center Location VUmc Amsterdamthe Netherlands
9. Department of Clinical Chemistry and Haematology Jeroen Bosch Hospital ‘s‐Hertogenboschthe Netherlands
10. LabWest Haga Teaching Hospital The Haguethe Netherlands
11. Department of Clinical Chemistry and Laboratory Medicine Leiden University Medical Center Leiden the Netherlands