[1] Childrens Hosp Colorado, Ctr Canc & Blood Disorders, Aurora, CO USA
[2] Fdn IRCCS Policlin San Matteo, Pediat Hematol Oncol, Pavia, Italy
[3] Univ Turin, Childrens Hosp Regina Margherita, Turin, Italy
[4] Grp Apoio Ao Adolescente & Crianca Com Canc, Sao Paulo, Brazil
[5] Millennium Pharmaceut Inc, Cambridge, MA USA
[6] IRCCS Osped Pediat Bambino Gesu, Dept Pediat Hematol Oncol & Cell & Gene Therapy, Rome, Italy