Department of Clinical Pathology, University Health Network, Toronto, Ontario, Canada. Department of Laboratory Medicine & Pathobiology, University of Toronto, Toronto, Ontario, Canada. Department of Laboratory Medicine and Molecular Diagnostics, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada. Division of Neonatology, Department of Pediatrics, Leiden University Medical Center, Leiden, The Netherlands. Department of Pediatrics, Unity Health Toronto (St. Michael's Hospital), Toronto, Ontario, Canada. Division of Haematology-Oncology, The Hospital for Sick Children, Toronto, Ontario, Canada. Division of Hematology, Oncology, and Stem Cell Transplant, Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA. Divisions of Neonatology and Hematology/Oncology, University of Utah Health, Salt Lake City, UT, USA. Department of Women and Newborn's Research, Intermountain Healthcare, Salt Lake City, Utah, USA. Department of Haematology, Royal Children's Hospital, Melbourne, Australia. Division of Pathology & Laboratory Medicine, Children's National Hospital, Washington, District of Columbia, USA. Department of Pathology & Pediatrics, The George Washington University Health Sciences, Washington, District of Columbia, USA. Division of Transfusion Medicine, Department of Pathology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA. Simmons Cancer Institute at SIU School of Medicine, Springfield, Illinois, USA. Departments of Laboratory Medicine and Pediatrics, Yale University, New Haven, Connecticut, USA. SAHMRI Women and Kids, South Australian Health and Medical Institute, North Adelaide, South Australia, Australia. Adelaide Medical School and the Robinson Research Institute, the University of Adelaide, North Adelaide, South Australia, Australia. Canadian Blood Services, Ottawa, Ontario, Canada. Department of Translational and Precision Medicine, Sapienza University, Rome, Italy. Italian National Blood Centre, National Institute of Health, Rome, Italy. Department of Pediatrics, University of Ottawa, Ottawa, Ontario, Canada. Children's Hospital, University Hospital, Philipps University, Marburg, Germany. Department of Immunohematology, Blood and Tissue Bank of Catalonia, Barcelona, Spain. Alberta Precision Laboratories and Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada. Clinical Directorate, NHS Blood and Transplant, London, UK. Centre for Haematology, Imperial College London, London, UK. Department of Laboratory Medicine and Pathology, Unity Health Toronto (St. Michael's Hospital), Toronto, Ontario, Canada. IFF/Fundação Oswaldo Cruz, Rio de Janeiro, Brazil. Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA. Departments of Medicine, Laboratory Medicine and Pathobiology, Institute of Health, Policy Management and Evaluation, University of Toronto, Mount Sinai Hospital, Toronto, Ontario, Canada.