OUTLINE: This is a multicenter, randomized study. Patients are stratified according to tumor size (< 1 cm vs 1-1.5 cm vs > 1.5-2.0 cm) (based on the maximum dimension determined from the preoperative CT scan), histology (squamous cell carcinoma vs adenocarcinoma vs other), and smoking status (never smoked [smoked < 100 cigarettes over lifetime] vs former smoker [smoked > 100 cigarettes AND quit ≥ 1 year ago] vs current smoker [quit < 1 year ago or currently smokes]). Patients are randomized to 1 of 2 treatment arms. For more information, please see the Arms section.