OUTLINE: Randomized study. The following acronyms are used: CYSP Cyclosporine, NSC-290193 DHAD Mitoxantrone, NSC-301739 VP-16 Etoposide, NSC-141540 Arm I: 2-Drug Combination Chemotherapy. DHAD; VP-16. Arm II: 2-Drug Combination Chemotherapy with Drug Resistance Inhibition. DHAD; VP-16; with CYSP.