1. Global cancer statistics;Jemal;CA Cancer J Clin,2011
2. Lung cancer;Herbst;N Engl J Med,2008
3. The importance of sputum cytology in the diagnosis of lung cancer: a cost-effective analysis;Raab;Chest,1997
4. Cytological analysis of sputum: the simplest and preliminary method of lung cancer Diagnosis- a retrospective analysis of 8690 samples of symptomatic patients;Veena;Int J Sci Res Publ,2012
5. Sensitivity of sputum cytology after homogenization with dithiothreitol in lung cancer detection-two years of experience;Tang;Acta Cytol,1995