- Element HR-2: Patients receive DEXA on days 1-5; vindesine on days 1 and 6; DNR on day 5; MTX and ifosfamide every 12 hours on days 2-4 (5 doses); ASP on days 6 and 11; and MTX/ARA-C/PRED IT on day 1.* NOTE: *HR patients with CNS disease also receive IT therapy on day 5.