- HDCT: Patients who undergo TLI only OR IFRT and TLI receive high-dose cyclophosphamide IV twice daily and etoposide IV once daily on days -5 and -2. Patients who undergo IFRT only OR do not undergo radiotherapy receive high-dose cyclophosphamide IV twice daily and etoposide IV once daily on days -6 and -3 and carmustine IV once on day -2.