1. Department of Pathology, Microbiology and Immunology Vanderbilt University Medical Center Nashville Tennessee USA
2. Division of Pathology and Laboratory Medicine Children's National Hospital Medical Center Washington District of Columbia USA
3. Department of Pathology and Laboratory Medicine University of Vermont Burlington Vermont USA
4. Transfusion Services Children's Minnesota Minneapolis Minnesota USA
5. Hemotherapy and Cell Therapy Department Hospital Israelita Albert Einstein Sao Paulo Brazil
6. Department of Paediatric Subspecialties KK Women's and Children's Hospital Singapore
7. Duke‐NUS Medical School Singapore
8. Division of Hematology‐Oncology, Department of Pediatrics CHU Sainte‐Justine Montreal, Quebec Canada
9. Women's and Children's Hospital Adelaide North Adelaide South Australia Australia
10. Department of Haematology NHS Blood and Transplant/Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital Oxford UK
11. Radcliffe Department of Medicine University of Oxford Oxford UK
12. Oxford BRC Haematology Theme Oxford UK
13. Center for Clinical Transfusion Research Sanquin/LUMC Leiden The Netherlands
14. Department of Pathology Beth Israel Deaconess Medical Center and Harvard Medical School Boston Massachusetts USA