Is completion lobectomy merited for unanticipated nodal metastases after radical segmentectomy for cT1 N0 M0/pN1-2 non-small cell lung cancer? - Nomori, H; Mori, T; Izumi, Y; Kohno, M; Yoshimoto, K; Suzuki, M (J Thorac Cardiovasc Surg, 2012)