PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: No prior chemotherapy No other concurrent chemotherapy Endocrine therapy: No concurrent hormones except for steroids administered for adrenal failure or septic shock, or hormones administered for non-disease-related conditions (e.g., insulin for diabetes) Glucocorticosteroids permitted as antiemetics Radiotherapy: No prior radiotherapy Surgery: At least 2 weeks since exploratory thoracotomy