4 Division for Stem Cell Transplantation and Immunology, Department for Children and Adolescents, University Hospital, Goethe University, Frankfurt/Main, Germany.
5 Hematology Unit, G. Gaslini, Research Children's Hospital, Genova, Italy.
6 Department of Pediatrics, Division of Stem Cell Transplantation, Leiden University Medical Center, Leiden, The Netherlands.
7 Department of Hematology, Oncology and Internal Medicine, Medical University of Warsaw, Warsaw, Poland.
8 Haemato-oncology, St Bartholomew's Hospital, Barts Health NHS Trust, London, UK.
9 Hematology Division, Chaim Sheba Medical Center, Tel Hashomer, Israel.
10 Department of Haematology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK.
11 Department of Pediatric Hematology and Oncology; Collegium Medicum; Nicolaus Copernicus University Torun, Bydgoszcz, Poland.
12 Hospital Puerta de Hierro - Universidad Autónoma de Madrid, Madrid, Spain.
13 Department of Stem Cell Transplantation, University Hospital Eppendorf, Hamburg, Germany.
14 Hôpital Saint-Antoine, Université Pierre & Marie Curie and INSERM, Paris, France.