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. 2020 Sep 22;123(11):1616–1624. doi: 10.1038/s41416-020-01054-6

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© The Author(s), under exclusive licence to Cancer Research UK 2020

Note This work is published under the standard license to publish agreement. After 12 months the work will become freely available and the license terms will switch to a Creative Commons Attribution 4.0 International (CC BY 4.0).

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Fig. 4 — a Kaplan–Meier estimates in patients without erlotinib treatment by EGFR expression status. b Kaplan–Meier estimates in patients treated with erlotinib by EGFR expression status. HR hazard ratio.