1. Type of lymph node involvement and survival in pathologic N1 stage III non–small cell lung carcinoma 
Edwin van Velzen, MD, Aart Brutel de la Rivière, MD, PhD, Hans J.J Elbers, MD, PhD, Jan-Willem J Lammers, MD, PhD, Jules M.M van den Bosch, MD, PhD 
The Annals of Thoracic Surgery 
Volume 67, Issue 4, Pages (April 1999)
DOI: /S (99)00123-X

2. Fig 1
Cumulative 5-year survival curves for patients with pathologic N1 T3 disease (solid line) and T4 disease (broken line). (+ = censored patient; T3: 17 patients censored; T4: 10 patients censored.)
The Annals of Thoracic Surgery  , DOI: ( /S (99)00123-X)