1. Sanquin Blood Supply; Amsterdam the Netherlands
2. Centre for Clinical Transfusion Research; Sanquin Research; Leiden
3. Jon J. Van Rood Centre for Clinical Transfusion Research; Sanquin-Leiden University Medical Centre; Leiden
4. Department of Immunohematology and Blood Transfusion; Leiden University Medical Center; Leiden
5. Europdonor Foundation; Leiden the Netherlands