[1] Dana Farber Canc Inst, Boston, MA 02115 USA
[2] Univ S Florida, H Lee Moffitt Canc Ctr, Tampa, FL 33682 USA
[3] Mem Sloan Kettering Canc Ctr, New York, NY 10021 USA
[4] Hackensack Univ, Med Ctr, Hackensack, NJ USA
[5] Univ Michigan, Ann Arbor, MI 48109 USA
[6] Nationwide Childrens Hosp, Dept Pediat Hem Oncol, Columbus, OH USA
[7] Stanford Univ, Med Ctr, Stanford, CA 94305 USA
[8] Childrens Hosp Philadelphia, Philadelphia, PA 19104 USA
[9] Univ Penn, Sch Med, Philadelphia, PA 19104 USA
[10] Duke Univ, Med Ctr, Durham, NC USA
[11] Univ Ulm, Dept Pediat, D-7900 Ulm, Germany
[12] Klinikum Univ Regensburg, Abt Hamatol Intern Onkol, Regensburg, Germany
[13] Boston Univ, Boston, MA 02215 USA
[14] Gentium Pharmaceut SPA, Villa Guardia, Italy