1 Department of Internal Medicine II, University Hospital Schleswig-Holstein, Kiel, Germany.
2 CLIP-Childhood Leukaemia Investigation Prague, Department of Paediatric Haematology and Oncology, Second Faculty of Medicine, Charles University and University Hospital Motol, Prague, Czech Republic.
3 St. Anna Children's Cancer Research Institute (CCRI), Vienna, Austria.
4 Austrian Academy of Sciences, CeMM Research Center for Molecular Medicine, Vienna, Austria.
5 Hematology Division, Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy.
6 Department of Immunology, Laboratory Medical Immunology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, Netherlands.