Patients receive conditioning comprising cyclophosphamide IV over 1 hour on days -6 to -3 and etoposide IV over 1 hour every 12 hours and cisplatin IV continuously on days -6 to -4. Bone marrow and/or PBSC are infused on day 0. (Patients requiring more than 25 bags of stem cells receive bone marrow transplantation on day 0 and PBSC transplantation on day 1.)