- Consolidation therapy: Patients receive rituximab IV on day -4 and high-dose cyclophosphamide IV on days -3, -2, -1, and 0. Patients receive G-CSF SC once daily beginning on day 6 and continuing until blood counts recover OR pegfilgrastim SC once on day 6. Patients then receive rituximab IV once weekly for 4 weeks in the absence of disease progression or unacceptable toxicity.