1. Cancer facts and figures 2012;American Cancer Society,2012
2. TNM classification for lung cancer;Watanabe;Ann Thorac Cardiovasc Surg,2003
3. TNM classification of malignant tumors;UICC,1973
4. A system for the clinical staging of lung cancer;Mountain;Am J Roentgenol Radium Ther Nucl Med,1974
5. Revisions in the international system for staging lung cancer;Mountain;Chest,1997