Cervical Ultrasound (US) and US-guided Lymph Node Biopsy as a Routine Procedure for Staging of Lung Cancer - Prosch, H; Strasser, G; Sonka, C; Oschatz, E; Mashaal, S; Mohn-Staudner, A; Mostbeck, G H (Ultraschall in der Medizin - European Journal of Ultrasound, 2007)