- Regimen DD-4A: Patients receive DACT IV on weeks 0, 6, 12, 18, and 24; VCR IV weekly on weeks 1-10, 12, 15, 18, 21, and 24; doxorubicin (DOX) IV on weeks 3, 9, 15, and 21; and abdominal radiotherapy in the absence of disease progression.