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Kaplan‐Meier survival curves for (a) DFS in stage I NSCLC <3 cm who underwent lobectomy or sublobar resection, 
I. Lobectomy, 
II. Sublobar resection, p = 0.002 and (b) DFS of patients who underwent lobectomy or medically unfit or surgeons' preference sublobar resections. 
I. Lobectomy, 
II. Surgeons’ preference sublobar resection, 
III. Medically unfit, P < 0.001.
