1. Division of Hematology/Oncology; Department of Pediatrics; the Hospital for Sick Children; University of Toronto; Toronto Ontario Canada
2. Department of Pediatrics; Division of Hematology/Oncology; University of Alabama at Birmingham; Birmingham AL USA
3. Department of Cellular Biotechnologies and Haematology; Sapienza University of Rome; Rome Italy
4. Division of Hematology/Oncology; Children's Hospital and Research Center Oakland; Oakland CA USA
5. Paediatric Haematology/Oncology; Hannover Medical School; Hannover Germany
6. Atlantic Health System; Goryeb Children's Hospital; Morristown NJ USA
7. Department of Haematology and Oncology; Royal Hospital for Children; Glasgow UK
8. Haematology/Oncology; Hôpital Armand Trousseau; Paris France
9. Department of Oncology; Division of Leukemia/Lymphoma; St. Jude Children's Research Hospital; Memphis TN USA
10. Department of Haematology/Oncology; Our Lady's Children's Hospital; Dublin Ireland
11. Department of Paediatric Haematology and Oncology; IRCCS Ospedale Pediatrico Bambino Gesù; Rome Italy
12. University of Pavia; Pavia Italy
13. Paediatric Oncology; VU University Medical Centre; Amsterdam The Netherlands
14. Academy of Princess Máxima Centre for Paediatric Oncology; Utrecht The Netherlands