PATIENT CHARACTERISTICS: Age: 16 to 60 Performance status: WHO 0-2 Hematopoietic: Not specified Hepatic: Bilirubin no greater than 1.5 times upper limit of normal (ULN) Renal: Creatinine no greater than 1.5 times ULN Cardiovascular: No severe heart failure requiring diuretics No ejection fraction of less than 50% Neurologic: No severe concurrent neurological or psychiatric disease Other: HIV negative No allogeneic stem cells from donors other than HLA identical sibling(s)