1. Department of Pediatric Hematology and Immunology, Hôpital Universitaire Robert Debré AP‐HP and Université Paris‐Cité Paris France
2. Pediatrics and Tettamanti Center Fondazione IRCCS San Gerardo dei Tintori Monza Italy
3. Biostatistics and Clinical Epidemiology Fondazione IRCCS San Gerardo dei Tintori Monza Italy
4. School of Medicine and Surgery University of Milano‐Bicocca Milan Italy
5. Clinical Experimental Haematology Unit IRCCS Istituto Giannina Gaslini Genova Italy
6. Hospital Gustavo Fricke, Pediatrics Viña del Mar Chile
7. Department of Hematology‐Oncology Hospital de Pediatría S.A.M.I.C. “Prof. Dr. Juan P. Garrahan” Buenos Aires Argentina
8. Department of Pediatric Hematology and Oncology, IRCCS Ospedale Pediatrico Bambino Gesù Catholic University of the Sacred Heart Rome Italy
9. Department of Genetics, Hôpital Universitaire Robert Debré AP‐HP and Université Paris‐Cité Paris France
10. Department of Pediatric Hematology and Oncology, Second Faculty of Medicine Charles University and University Hospital Motol Prague Czech Republic
11. Pediatric Oncology Princess Maxima Center for Pediatric Oncology Utrecht the Netherlands