1. Center for Clinical Transfusion Research, Sanquin Research; Leiden the Netherlands
2. Department of Clinical Epidemiology; Leiden University Medical Center; Leiden the Netherlands
3. Transfusion and Transplantation Reactions in Patients; Dutch National Hemovigilance and Biovigilance Office; Leiden the Netherlands
4. Department of Hematology; Haga Teaching Hospital; The Hague the Netherlands