1. Department of Pediatric Hematology, University Medical Center Utrecht, Wilhelmina Children's Hospital, Utrecht, The Netherlands
2. Department of Medical Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
3. Department of Obstetrics and Gynaecology, Isala, Zwolle, The Netherlands
4. Department of Neonatology, Isala, Zwolle, The Netherlands
5. Department of Neonatology, University Medical Center Utrecht, Wilhelmina Children's Hospital, Utrecht, The Netherlands