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. 2020 Aug;12(8):4347–4356. doi: 10.21037/jtd-20-2137

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2020 Journal of Thoracic Disease. All rights reserved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0.

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Kaplan-Meier curves of OS and PFS in different age groups. (A) Kaplan-Meier curve of OS; (B) Kaplan-Meier curve of PFS. OS, overall survival; PFS, progression free survival.