PRIOR CONCURRENT THERAPY: Biologic therapy: No concurrent immunotherapy Chemotherapy: No prior systemic chemotherapy Endocrine therapy: No chronic use of steroids No concurrent hormonal therapy (except birth control pills) Radiotherapy: At least 1 month since prior radiotherapy No concurrent palliative radiotherapy (arm I patients) Surgery: Must have fully recovered from surgery Other: At least 4 weeks since other investigational agents and recovered from all toxic effects No chronic use of aspirin, nonsteroidal antiinflammatory agents, antianginal medications, or extraordinary antihypertensive regimens