Exatecan Mesylate in Treating Patients With Ewing's Sarcoma, Primitive Neuroectodermal Tumor, or Desmoplastic Small Round Cell Tumor

Memorial Sloan-Kettering Cancer Center, New York

Nemours Children's Clinic, Jacksonville

St. Jude Children's Research Hospital, Memphis

Medical City Dallas Hospital, Dallas

University of Colorado Cancer Center at University of Colorado Health Sciences Center, Denver

Cancer Institute of New Jersey, New Brunswick

Simmons Cancer Center at University of Texas Southwestern Medical Center - Dallas, Dallas

University of Texas - MD Anderson Cancer Center, Houston

Hospital for Sick Children, Toronto