1 Bone Marrow Transplantation, Great Ormond Street Hospital for Children, London, United Kingdom. maria.gabelli@unipd.it.
2 Pediatric Hematology, Oncology and Stem Cell Transplantation, Università degli Studi di Padova, Padova, Italy. maria.gabelli@unipd.it.
3 Pediatric Hematology, Oncology and Stem Cell Transplantation, Hospital Universitario La Paz, Universidad Autónoma de Madrid, Instituto de Investigación La Paz, Madrid, Spain.
4 Bone Marrow Transplantation, Great Ormond Street Hospital for Children, London, United Kingdom.
5 Bone Marrow Transplantation, CHU de Québec-Université Laval, Hotel-Dieu de Québec, Québec, Canada.
6 Cellular and Molecular Therapeutics Branch, National Heart, Lung, and Blood Institute, Bethesda, MD, USA.
7 Center for Cancer and Blood Disorders, Phoenix Children's Hospital, Phoenix, AZ, USA.
8 Pediatric Hematology, Oncology and Stem Cell Transplantation, Hospital Sant Joan de Déu, Barcelona, Spain.