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. 2019 Apr 29;14:893–903. doi: 10.2147/COPD.S185837

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© 2019 Shah et al.

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Kaplan–Meier survival analysis of COPD versus non-COPD among elderly patients with NSCLC.

Notes: (A) Stage I NSCLC. (B) Stage II NSCLC. (C) Stage III NSCLC. (D) Stage IV NSCLC.

Abbreviations: NSCLC, non-small cell lung cancer.