PROJECTED ACCRUAL: Up to 92 patients (10 for Regimen A, 28 for Regimen B, 54 for Regimen C) will be entered over 3 years. If there are no CRs among the first 6 patients on Regimens A and B or the first 19 patients on Regimen C, accrual to that regimen will cease. If more than 4 infectious deaths occur among the first 10 patients or if the rate of disease progression exceeds 20% on any regimen, further accrual to that regimen will cease.