The Intergroup Rhabdomyosarcoma Study Group (IRSG): Major Lessons from the IRS-I through IRS-IV Studies as Background for the Current IRS-V Treatment Protocol Sarcoma Sarcoma Raney, R., Maurer HM, Anderson JR, Andrassy RJ, Donaldson SS, Qualman SJ, Wharam MD, Wiener ES, Crist WM 2001; 5: 9-15