1. INSERM Clinical Investigation Center 1402; Poitiers University; Poitiers France
2. Department of Pediatrics; Carl Gustav Carus University Hospital; Dresden Germany
3. Department of Pediatric Hematology; Robert Debré Hospital; Paris France
4. Department of Pediatric Hematology; Uludağ University Hospital; Görükle Bursa Turkey
5. Department of Pediatric Hematology-Oncology, Motol University Hospital; Charles University; Prague Czech Republic
6. Department of Pediatric Oncology-Hematology, University Medical Center Groningen; University of Groningen; Groningen the Netherlands
7. Dutch Childhood Oncology Group; the Hague the Netherlands
8. Department of Pediatrics, Prince of Wales Hospital; Chinese University of Hong Kong; Hong Kong China
9. Department of Pediatric Hematology-Oncology and Transplantation; Wroclaw Medical University; Wroclaw Poland
10. Department of Pediatrics, Rigshospitalet; University Hospital; Copenhagen Denmark
11. Department of Pediatric Hematology, Oncology, Immunology, and Medical Genetics; Clinical Hospital; Split Croatia
12. Children's Cancer Research Institute and St. Anna Children's Hospital; Vienna Austria
13. Department of Pediatric Oncology; University Children's Hospital; Bratislava Slovakia
14. Department of Pediatrics; Ghent University Hospital; Ghent Belgium
15. Department of Pediatrics; Saint George Hospital University Medical Centre; Beirut Lebanon
16. Department of Pediatrics, San Gerardo Hospital; University of Milano-Bicocca, Fondazione Monza e Brianza per il Bambino e la sua Mamma; Monza Italy