Cost-Efficacy of Endoscopic Ultrasonography with Fine-Needle Aspiration vs. Mediastinotomy in Patients with Lung Cancer and Suspected Mediastinal Adenopathy - Aabakken, L.; Silvestri, G. A.; Hawes, R.; Reed, C. E.; Marsi, V.; Hoffman, B. (Endoscopy, 1999)