1 Wilhelmina Children's Hospital, University Medical Centre Utrecht, Utrecht, The Netherlands.
2 St. Anna Children's Hospital, Medical University of Vienna, Austria.
3 Clinica Pediatrica, Università degli Studi di Milano Bicocca, Fondazione MBBM / Ospedale San Gerardo, ASST Monza, Italy.
4 Pediatric Immunohematology Unit and BMT Program, San Raffaele Telethon Institute for Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan; Vita-Salute San Raffaele University Milan, Italy.
5 Translational and Clinical Research Institute, Newcastle University and The Great North Children's Hospital, Newcastle upon Tyne, UK.
6 Department of Paediatric Oncology, Haematology and Clinical Immunology, Medical Faculty, Heinrich-Heine University Dusseldorf, Dusseldorf, Germany.
7 Divisions of Oncology, Hematology, Immunology and Stem Cell Transplantion, University Children's Hospital Zurich, Switzerland.
8 IRCCS Istituto Giannina Gaslini, Genoa, Italy.
9 Newcastle University and Great North Children's Hospital, Newcastle upon Tyne, UK.
10 Manchester Children's Hospital, Manchester University NHS Foundation Trust, Manchester, UK.
11 Department of Pediatrics, Aarhus University Hospital, Aarhus University, Denmark.
12 CLIP - Childhood Leukaemia Investigation Prague, Second Faculty of Medicine, Charles University, University Hospital Motol, Prague, Czech Republic.
13 Rina Zaizov Pediatric Hematology Oncology Division, Schneider Children's Medical Center of Israel, Petach Tiqva, and Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Israel.
14 Unité Hématologie-Immunologie, Hôpital Robert Debré, Paris, France.
15 Department of Pediatric Hemato-oncology, Princess Máxima Centrum for Pediatric Oncology, Utrecht, The Netherlands.