METHODS	A prospective , randomized , multicenter study was conducted by Shanghai Lung Cancer Team ( supported by Shanghai Branch of Discipline Foundation ) since 1995-1997 for 211 cases of stage I-IIIa NSCLC with curative resection ( 99 stage I , 47 stage II , 65 stage III ) , age of < or = 75 , KPS > or = 80 , staged by 1997 AJC TNM Criteria .\