1. Department of Experimental Immunohematology, Sanquin Research, Amsterdam and Landsteiner Laboratory, Academic Medical Centre; University of Amsterdam; Amsterdam The Netherlands
2. Division of Women and Baby, Department of Obstetrics; University Medical Centre Utrecht; Utrecht The Netherlands
3. Department of Immunohematology Diagnostics, Sanquin Diagnostic Services; Amsterdam The Netherlands
4. Department of Obstetrics and Gynecology, Erasmus MC; University Medical Centre Rotterdam; Rotterdam The Netherlands