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. 2017 Sep 12;17:646. doi: 10.1186/s12885-017-3641-6

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© The Author(s). 2017

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. 1 — Duration of exposure and RECIST evaluation (FAS, N = 54). Footnote: ESCC esophageal squamous cell carcinoma, PD progressive disease, PR partial response, Q2W once every two weeks, QW once weekly, RECIST Response Evaluation Criteria In Solid Tumors, SCCHN squamous cell carcinoma of the head and neck, SD stable disease, UNK unknown