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. 2014 Sep 8;9(9):e107276. doi: 10.1371/journal.pone.0107276

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© 2014 Li et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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EGFR and KRAS mutation status were not associated with relapse-free survival (P = 0.600) or overall survival (P = 0.873) in lung adenocarcinoma; c–d. Lymphnode stage (N stage) was significantly associated with relapse-free survival (P = 0.001) or overall survival (P = 0.001) in NSCLC.