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. 2018 Mar 5;9(5):532–541. doi: 10.1111/1759-7714.12601

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© 2018 The Authors. Thoracic Cancer published by China Lung Oncology Group and John Wiley & Sons Australia, Ltd

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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Trends in proportions in different age groups of (a) adenocarcinoma (ADC), (b) squamous cell carcinoma (SQCC), and (c) small cell lung cancer (SCLC). () Young, () middle‐aged, and () old.

Inline graphic — Trends in proportions in different age groups of (a) adenocarcinoma (ADC), (b) squamous cell carcinoma (SQCC), and (c) small cell lung cancer (SCLC). () Young, () middle‐aged, and () old.