1. Centre for Child and Adolescent Health HELIOS Klinikum Krefeld Germany
2. Department of Pediatric Pneumology, Allergology and Neonatology Hannover Medical School Hannover Germany
3. Institute for Transfusion Medicine University of Ulm Ulm Germany
4. Institute for Pathology, Nephropathology Section Hannover Medical School Hamburg Germany
5. Institute of Neuropathology University Medical Center Hamburg‐Eppendorf Hamburg Germany
6. Central Research Facility Cell Sorting Hannover Medical School Hannover Germany
7. Pediatric Hematology and Oncology Martin‐Luther‐University Halle‐Wittenberg Halle Germany
8. Department of Pediatric Hematology and Oncology Hannover Medical School Hannover Germany
9. Department of Immunology and Infectious Disease John Curtin School of Medical Research Canberra Australian Capital Territory Australia
10. Centre for Personalised Immunology Australian National University Canberra Australian Capital Territory Australia
11. Institute for Clinical Transfusion Medicine and Immunogenetics Ulm German Red Cross Blood Service Baden‐Wuerttemberg‐Hessen Ulm Germany