OUTLINE: This is a randomized, multicenter study. Patients are stratified according to gender (male vs female), stage of disease (IIIB-T4Nx [with nodule in ipsilateral lung lobe and not candidate for combined chemotherapy and radiation] and IV M1a vs IV M1b vs recurrent), best response to first-time therapy (complete response/partial response vs stable disease), and smoking status (never vs smoker).