Article Citation
Singh N, Jindal A, Behera D. Erlotinib usage after prior treatment with gefitinib in advanced non-small cell lung cancer: A clinical perspective and review of published literature. World J Clin Oncol 2014; 5(5): 858-864 [PMID: 25493223 DOI: 10.5306/wjco.v5.i5.858]
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