1. Paediatrics Department; Saint Mary Hospital; London UK
2. Department of Paediatric Haematology; Hopital Robert Debré; Paris France
3. M. Tettamanti Research Centre; Paediatrics Department; University of Milano-Bicocca; Monza Italy
4. Department of Paediatric Oncology; Beatrix Children's Hospital; Groningen the Netherlands
5. Department of Paediatric Haematology-Oncology; CHR La Citadelle; Liège Belgium
6. Department of Paediatric Haematology & Oncology; University Hospital; Technical University Dresden; Dresden Germany
7. Department of Paediatric Oncology; CHU Poitiers; Poitiers France