1 Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands.
2 Division of Hematology and Oncology, Department of Pediatrics, Hospital for Sick Children, Toronto, Canada.
3 Department of Pediatric Hematology and Oncology, University Hospital La Fe of Valencia, Valencia, Spain.
4 Hematopathology section, Pathology Department, Hospital Clinic of Barcelona, University of Barcelona, Barcelona, Spain.
5 Maternal and Child Health Department, Pediatric Hematology, Oncology and Stem Cell Transplant Center, University of Padova, Padova, Italy.
6 Department of Paediatrics & Adolescent Medicine, The University of Hong Kong, Hong Kong.
7 Pediatric Clinic (Tűzoltó Street Department), Semmelweis University, Budapest, Hungary.
8 Department of Pediatric Hematology and Oncology, Department of Pediatrics, University Hospital Liège, Liège, Belgium.
9 Department of Pediatric Hematology and Oncology, Cliniques universitaires Saint-Luc, UC Louvain, Brussels, Belgium.
10 Department of Pediatric Hematology and Oncology, Schneider Children's Medical Center, Petah Tikva, and Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
11 Department of Hematology and Oncology for children and adolescents, Sapporo Hokuyu Hospital, Sapporo, Japan.
12 Department of Clinical Haematology, Oncology, Blood and Marrow Transplantation, Perth Children's Hospital, Perth, Australia.
13 Leukaemia Translational Research Laboratory, Telethon Kids Cancer Centre, Telethon Kids Institute, University of Western Australia, Perth, Australia.
14 Curtin Medical School, Curtin University, Perth, Australia.
15 Department of Pediatric Hematology and Oncology, Charles University and University Hospital Motol, Prague, Czech Republic.
16 Hematopathology Section, Department of Pathology, University Hospital Schleswig-Holstein, Kiel, Germany.
17 Department of Pediatric Hematology and Oncology, Federal Center for Pediatric Hematology, Oncology and Immunology, Moscow, Russia.
18 Department of Pediatric and Adolescent Oncology, Gustave-Roussy Cancer Campus, Paris-Sacaly University, Villejuif, France.
19 Department of Clinical Research, Saitama Children's Medical Center, Saitama, Japan.
20 Department of Pathology, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain.
21 Pediatric Hematology and Oncology and NHL-BFM Study Center, University Hospital Münster, Münster, Germany.
22 Department of Pediatric Hematology and Oncology, Hospital Clínico Universitario, Biomedical Research Institute, INCLIVA, Valencia, Spain.
23 Department of Pediatric Hematology and Oncology, St. Anna Children's Hospital, Medical University of Vienna, Vienna, Austria.
24 Pediatric Hematology and Oncology and NHL-BFM Study Center, Medical Center Hamburg-Eppendorf, Hamburg, Germany.
25 St. Anna Children's Cancer Research Institute, Vienna, Austria.