Results of surgical intervention for p-stage IIIA (N2) non-small cell lung cancer: acceptable prognosis predicted by complete resection in patients with single N2 disease with primary tumor in the upper lobe. - Inoue,M.; Sawabata,N.; Takeda,S.; Ohta,M.; Ohno,Y.; Maeda,H. (J Thorac Cardiovasc Surg, 2004)