O. Senbaklavaci, H. Taspinar, M. Hartert, S. Ergun, S. Keranen, and C. Vahl, “Lobar lung resection in elderly patients with non-small cell lung carcinoma: impact of cardiac comorbidity on surgical outcome”, Swiss Med Wkly, vol. 142, no. 5152, p. w13742, Dec. 2012.