1. Department of ImmunopathologySanquin Research Amsterdam The Netherlands
2. Landsteiner Laboratory, Academic Medical CentreUniversity of Amsterdam Amsterdam The Netherlands
3. Center for Clinical Transfusion ResearchSanquin Research Leiden The Netherlands
4. Jon J. van Rood Center for Clinical Transfusion ScienceLeiden University Medical Center Leiden The Netherlands
5. Blood Systems Research Institute San Francisco California
6. Department of Laboratory MedicineUniversity of California, San Francisco San Francisco California
7. Swammerdam Institute for Life Sciences, University of Amsterdam Amsterdam The Netherlands
8. Department of Immunohematology and Blood TransfusionLeiden University Medical Center Leiden The Netherlands