1. Department of Immunology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands;
2. Childhood Leukaemia Investigation Prague, Department of Paediatric Haematology and Oncology, Second Faculty of Medicine, Charles University, University Hospital Motol, Prague, Czech Republic;
3. Department of Pediatric Hematology and Oncology, Zabrze, Medical University of Silesia, Katowice, Poland;
4. Dutch Childhood Oncology Group, The Hague, The Netherlands;
5. Centro Ricerca Tettamanti, Clinica Pediatrica Università di Milano Bicocca, Monza, Italy;
6. Department of Hematology, University of Schleswig-Holstein, Campus Kiel, Kiel, Germany;
7. Department of Pediatrics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil;
8. Department of Hematology, Hôpital Necker-Enfants-Malades and Unité Mixte de Recherche Centre National de la Recherche Scientifique 8147, University of Paris Descartes, Paris, France;
9. Cancer Research Center (Instituto de Biología Molecular y Celular del Cancer–Consejo Superior de Investigaciones Científicas), Department of Medicine and Cytometry Service, University of Salamanca, Institute of Biomedical Research of Salamanca, Salamanca, Spain; and
10. Cytognos SL, Salamanca, Spain