OUTLINE: The following acronyms are used: ARA-C Cytarabine, NSC-63878 DHAD Mitoxantrone, NSC-301739 G-CSF Granulocyte Colony-Stimulating Factor (source not specified) HU Hydroxyurea, NSC-32065 MCE DHAD/ARA-C/VP-16 VP-16 Etoposide, NSC-141540 Single-Agent Cytoreduction followed by 3-Drug Combination Chemotherapy/Stem Cell Mobilization. HU; followed by MCE; G-CSF.