Comment on

• Addition of ifosfamide and etoposide to standard chemotherapy for Ewing's sarcoma and primitive neuroectodermal tumor of bone.

  Grier HE, Krailo MD, Tarbell NJ, Link MP, Fryer CJ, Pritchard DJ, Gebhardt MC, Dickman PS, Perlman EJ, Meyers PA, Donaldson SS, Moore S, Rausen AR, Vietti TJ, Miser JS. Grier HE, et al. N Engl J Med. 2003 Feb 20;348(8):694-701. doi: 10.1056/NEJMoa020890. N Engl J Med. 2003. PMID: 12594313 Clinical Trial.