%0 Journal Article %A S H Ren %A S J Xu %T Pathological assessment of mediastinal lymph nodes in lung cancer: implications for non-invasive mediastinal staging. %D 1993 %R 10.1136/thx.48.5.584 %J Thorax %P 584-584 %V 48 %N 5 %U https://thorax.bmj.com/content/thoraxjnl/48/5/584.1.full.pdf