1. Center for Clinical Transfusion Research Sanquin Research Leiden The Netherlands
2. Jon J van Rood Center for Clinical Transfusion Research Sanquin‐Leiden University Medical Center Leiden The Netherlands
3. Department of Obstetrics Leiden University Medical Center Leiden The Netherlands
4. Division of Neonatology Department of Pediatrics Leiden University Medical Center Leiden The Netherlands
5. Department of Clinical Chemistry and Laboratory Medicine Leiden University Medical Center Leiden The Netherlands
6. Department of Immunohematology and Blood Transfusion Leiden University Medical Center Leiden The Netherlands