PRIOR CONCURRENT THERAPY: Biologic therapy: Prior biologic therapy allowed No concurrent biologic therapy (including cyclosporine) Chemotherapy: At least 24 hours since prior cyclophosphamide At least 4 weeks since other systemic antineoplastic chemotherapy and recovered Endocrine therapy: Homeopathic corticosteroids allowed At least 4 weeks since prior corticosteroids No other concurrent corticosteroids Radiotherapy: Prior radiotherapy allowed Surgery: Prior surgery allowed