- Cohort 1: Three to six patients receive induction comprising etoposide IV over 1 hour on days 1-3, cyclophosphamide IV over 1-2 hours on day 8, and allogeneic donor lymphocyte infusion on day 10. Filgrastim (G-CSF) is administered subcutaneously (SC) or IV daily beginning on day 10 and continuing until blood counts recover.