1. Cambridge Institute for Medical Research, Cambridge, United Kingdom;
2. Department of Haematology, University of Cambridge, Cambridge, United Kingdom;
3. Wellcome Trust–Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge, United Kingdom;
4. INSERM Unité Mixte de Recherche 1163, Laboratory of Genome Dynamics in the Immune System, Equipe Labellisée Ligue contre le cancer, Paris, France;
5. Paris Descartes–Sorbonne Paris Cité University, Imagine Institute, Paris, France;
6. Medical Research Council Mammalian Genetics Unit, Harwell, United Kingdom;
7. Unidad de Investigación, Hospital Universitario de Canarias, La Laguna, Spain;
8. Instituto de Tecnologías Biomédicas, Universidad de La Laguna, La Laguna, Spain;
9. Centro Investigación Biomédica en Red Enfermedades Neurodegenerativas, La Laguna, Spain;
10. Department of Hematology, CRNMR Aplasie Médullaire, Saint-Louis University Hospital, Assistance Publique–Hôpitaux de Paris, Paris, France;
11. Department of Haematology, Centre Hospitalier Universitaire de Nancy, Nancy, France;
12. Department of Pediatric Hematology-Oncology, Centre Hospitalier Universitaire Lenval, Nice, France;
13. Assistance Publique–Hôpitaux de Paris, Laboratory of Hematology, Robert Debré University Hospital, Paris, France;
14. Radiology Department, Armand Trousseau Hospital, Assistance Publique–Hôpitaux de Paris, Paris, France;
15. Department of Pediatric Imaging, Armand Trousseau Hospital, Sorbonne Universités, Pierre et Marie Curie-Paris University, Paris, France;
16. Institut Necker Enfants Malades, Paris, France;
17. INSERM, U1151, Université Paris Descartes Sorbonne Cité, Paris, France;
18. French Neutropenia Registry, Assistance Publique–Hôpitaux de Paris, Trousseau Hospital, Paris, France;
19. INSERM Unité Mixte de Recherche 1163, Bioinformatics Platform, Paris Descartes–Sorbonne Paris Cité University, Imagine Institute, Paris, France;
20. INSERM Unité Mixte de Recherche 1163, Genomics Platform, Paris Descartes–Sorbonne Paris Cité University, Imagine Institute, Paris, France;
21. Department of Genetics, Hospital Pitié Salpétriére Assistance Publique–Hôpitaux de Paris, Sorbonne Université, Paris, France;
22. Service d’Hémato-Oncologie Pédiatrique, Assistance Publique–Hôpitaux de Paris Hôpital Trousseau, Registre des neutropénies–Centre de référence des neutropénies chroniques, Paris, France;
23. Assistance Publique–Hôpitaux de Paris Service de Génétique, Hôpital Bichat, Paris, France; and
24. Université Paris Diderot, Sorbonne Paris Cité, Paris, France