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. 2019 Feb 4;7:30. doi: 10.1186/s40425-019-0508-1

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Kaplan–Meier estimates of progression-free survival (PFS) and overall survival (OS). a PFS from start of avelumab in the first-line switch-maintenance (1 L-mn) subgroup (n = 90). b OS from start of avelumab in the 1 L-mn subgroup (n = 90). c OS from start of 1 L chemotherapy in the 1 L-mn subgroup (n = 90). d PFS in the second-line (2 L) subgroup (n = 60). e OS in the 2 L subgroup (n = 60)