PRIOR CONCURRENT THERAPY: Biologic therapy: At least 1 week since prior transfusion Prior biologic therapy allowed and recovered No other concurrent biologic therapy Chemotherapy: Prior chemotherapy allowed and recovered No other concurrent chemotherapy Endocrine therapy: Prior hormonal therapy allowed and recovered Concurrent palliative hormonal therapy allowed Radiotherapy: Prior radiotherapy allowed and recovered No concurrent radiotherapy (except palliative) Surgery: At least 2 weeks since prior major surgery with wound complications Other: At least 2 weeks since prior investigational drugs No other investigational drugs during or within 28 days of study No concurrent CYP-3A metabolism dependent drugs