1. Department of Paediatrics, Division of Neonatology, Beatrix Children’s Hospital, University Medical Center Groningen , Groningen , The Netherlands
2. Chemical Sciences Division , National Institute of Standards and Technology (NIST) , Gaithersburg , MD , USA
3. Department of Laboratory Medicine , Radboud University Medical Centre , Nijmegen , The Netherlands
4. Laboratoire National de Métrologie et d’Essais (LNE) , Paris , France
5. Department of Pathology and Laboratory Medicine , Children’s Wisconsin and Medical College of Wisconsin , Milwaukee , WI , USA
6. Centre National de Référence en Hémobiologie Périnatale, Unit of Biologie, Pole Biology, Hopital Saint Antoine (Public Assistance Hospitals of Paris (AP-HP)) , Paris , France
7. Roche Diagnostics GmbH , Penzberg , Germany
8. The Royal Children’s Hospital , Parkville , VIC , Australia
9. Murdoch Children’s Research Institute , Parkville , VIC , Australia
10. School of Health Sciences, Swinburne University of Technology , Melbourne , VIC , Australia
11. National Measurement Institute , Sydney , NSW , Australia
12. Victorian Clinical Genetics Services, Murdoch Children’s Research Institute , Parkville , VIC , Australia
13. Department of Paediatrics , University of Melbourne , Parkville , VIC , Australia