[1] Dana Farber Canc Inst, Div Hematol Malignancies, Boston, MA 02115 USA
[2] Fred Hutchinson Canc Res Ctr, Seattle, WA 98104 USA
[3] Mem Sloan Kettering Canc Ctr, Boston, MA USA
[4] Johns Hopkins Univ, Baltimore, MD USA
[5] Duke Univ, Med Ctr, Durham, NC USA
[6] City Hope Natl Med Ctr, Hematol & Stem Cell Transplantat, Duarte, CA USA
[7] Stanford Univ, Stanford, CA 94305 USA
[8] Schneider Childrens Hosp, New Hyde Pk, NY USA
[9] Childrens Hosp Philadelphia, Philadelphia, PA USA
[10] Univ Michigan, Ann Arbor, MI 48109 USA
[11] Nationwide Childrens Hosp, Columbus, OH USA
[12] Univ S Florida, Coll Med, H Lee Moffitt Canc Ctr & Res Inst, Dept Blood & Marrow Transplantat, Tampa, FL 33612 USA
[13] Gentium, Como, Italy
[14] Boston Univ, Dept Stat, Boston, MA 02215 USA
[15] Gentium SpA, Dept Med Sci, Villa Guardia, Italy