[1] Olga Hosp, Klinikum Stuttgart, Stuttgart, Germany
[2] Univ Klinikum Munster, Munster, Germany
[3] Stanford Univ, Med Ctr, Div Hematol Oncol, Palo Alto, CA 94304 USA
[4] Lucile Packard Childrens Hosp, Palo Alto, CA 94304 USA
[5] Ist Ortoped Rizzoli, Sez Chemioterapia, Bologna, Italy
[6] NIH, Ctr Canc Res, Bethesda, MD 20892 USA
[7] Rikshosp Univ Hosp, Norwegian Radium Hosp, Div Canc Med & Radiotherapy, Oslo, Norway
[8] UCL Hosp, Dept Oncol, London, England
[9] George Washington Univ, Childrens Natl Med Ctr, Div Oncol, Washington, DC USA