Treatment schema.

Abbreviations: VAD, vincristine, adriamycin, dexamethasone; EDAP, etoposide (VP-16), dexamethasone, Ara-C (cytarabine), cisplatin; DCEP, dexmethasone, cyclophosphamide, etoposide (VP-16), cisplatin; CAD, cyclophosphamide, adriamycin, dexamethasone; HD, high-dose therapy; CTX, chemotherapy; MEL, melphalan.