Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) GINSBERG RJ,Extended cervical mediastinoscopy. A single staging procedure for bronchogenic carcinoma of the left upper lobe,J Thorac Cardiovasc Surg,,,1987,94,,673-678,https://cir.nii.ac.jp/crid/1571980075009369728,