[1] Heidelberg Univ, Univ Med Ctr Children & Adolescents, Heidelberg, Germany
[2] Marseille Univ, Dept Pediat Hematol, Marseille, France
[3] Feinberg Sch Med, Hematol Sect, Chicago, IL USA
[4] Childrens Hosp Philadelphia, Div Hematol, Philadelphia, PA USA
[5] UCL, Dept Haematol, London, England
[6] Ramathibodi Hosp, Dept Pediat, Fac Med, Bangkok, Thailand
[7] G Papanicolaou Hosp, Hematol Dept Hematopoiet Cell Transplantat Unit, Gene & Cell Therapy Ctr, Thessaloniki, Greece
[8] Hannover Med Sch, Pediat Hematol & Oncol, Hannover, Germany
[9] Great Ormond St Hosp Sick Children, London, England
[10] UCSF Benioff Childrens Hosp, Oakland, CA USA
[11] Bluebird Bio Inc, Cambridge, England
[12] Univ Calif San Francisco, San Francisco, CA 94143 USA
[13] Osped Pediat Bambino Gesu, Dept Pediat Hematol Oncol, Rome, Italy