PATIENT CHARACTERISTICS: Age: 30 and over Performance status: CALGB 0-2 Hematopoietic: Not specified Hepatic: Not specified Renal: Not specified Other: The following may increase the risk of protocol treatment: Serious intercurrent medical illness that might compromise patient safety Active acute infection requiring antibiotics Suppression therapy for chronic urinary tract infection allowed Uncontrolled or severe cardiovascular disease Psychiatric conditions that prevent compliance or informed consent