1. Department of Experimental Immunohematology Sanquin Research and Landsteiner Laboratory Amsterdam The Netherlands
2. Department of Obstetrics Leiden University Medical Center Leiden The Netherlands
3. Center of Clinical Transfusion Research Sanquin Research and Leiden University Medical Center Leiden The Netherlands
4. Department of Diagnostic Services Sanquin Amsterdam The Netherlands
5. Department of Immunohematology and Blood Transfusion Leiden University Medical Center Leiden The Netherlands