1. Sanquin-LUMC Jon J. van Rood Center for Clinical Transfusion Research; Leiden the Netherlands
2. Sanquin Blood Supply Foundation; Amsterdam the Netherlands
3. Department of Pediatrics; Division of Neonatology; Beatrix Children's Hospital; University Medical Center; Groningen the Netherlands
4. Department of Pediatrics; Division of Neonatology; Department of Clinical Epidemiology; Leiden University Medical Center; Leiden the Netherlands
5. Department of Pediatrics; Division of Neonatology; Sophia Children's Hospital; Erasmus Medical Center; Rotterdam the Netherlands