IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-10-9-36511 Original Research Paper Evaluation of the role of Gemcitabine and Erlotinib in stage IIIB and stage IV NSCLC Adenocarcinoma of Lung as a first line chemotherapy regimen and assessing B.K. Shewalkar Dr. Dr. Arpit A. Gite Dr. September 2021 10 9 01 02