Japanese Data Center for Hematopoietic Cell Transplantation, University of Basel - University Hospital Basel, University of Leipzig - Institute for Medical Informatics, Statistics and Epidemiology (IMISE), University of Barcelona - Department of Haematology, Medical College of Wisconsin - Center for International Blood and Marrow Transplant Research (CIBMTR), Aichi Medical University, Las Américas Auna - Instituto de Cancerología, The University of Western Australia - Fiona Stanley Hospital, Cairo University - National Cancer Institute, University of Benin - University of Benin Teaching Hospital, Pelé Pequeno Príncipe Research Institute, Hospital de la Princesa - Hematology Department, King Faisal Specialist Hospital and Research Centre - Oncology Center, Università Vita-Salute San Raffaele - San Raffaele Hospital, Hospital Israelita Albert Einstein, Instituto de Previsión Social, British Hospital, Sorbonne-Université, Hospital Civil de Guadalajara «Dr. Juan I. Menchaca», Università Vita-Salute San Raffaele - San Raffaele Hospital, Monash University, University of Amsterdam, Academic Medical Center, Department of Hematology, Medical College of Wisconsin, Wroclaw Medical University, National Taiwan University - National Taiwan University Hospital (NTUH), Aichi Medical University, University of London - Institute of Infection and Immunity, Peking University - Institute of Hematology, University College London - University College London Hospitals NHS Foundation Trust, Kyungpook National University - Kyungpook National University Hospital, Hôpital Necker-Enfants Malades, Keio University - School of Medicine, Medical College of Wisconsin, University of Manitoba, University of Illinois at Chicago, Università Vita-Salute San Raffaele - San Raffaele Hospital, Federal University of São Paulo (UNIFESP) - Paulista School of Medicine, Sheffield Teaching Hospitals NHS Foundation Trust, Christian Medical College - Department of Clinical Hematology, Peter MacCallum Cancer Centre, The University of Minnesota - Division of Hematology, Medical University of Vienna, Medical University of Graz, Medical College of Wisconsin - Center for International Blood and Marrow Transplant Research (CIBMTR), King Faisal Specialist Hospital and Research Centre - Oncology Center, University of Leipzig and Independent