2. One of the following: Received prior AZT/IFNα therapy for ≥2 weeks and achieved at least partial hematological response defined as > 50% reduction in absolute lymphocyte count) without evidence of new disease lesions or disease progression (defined as 50% increase in measurable disease from nadir as in section 14.5 if imaging is performed) at the time of enrollment; OR; Received chemotherapy for ≥ 2 weeks duration, followed by at least a partial hematologic response ((defined as > 50% reduction in absolute lymphocyte count), and without evidence of new disease lesions or disease progression (defined as 50% increase in absolute lymphocyte count or measurable disease from nadir as specified in section 14.5 if imaging is performed) at the time of enrollment.