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. 2019 Sep 18;19:927. doi: 10.1186/s12885-019-6065-7

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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. 1 — Frequency of lymph node recurrence according to the lymph node map for esophageal cancer found in the 8th edition of the AJCC. AJCC, American Joint Committee on Cancer. Blue column, upper thoracic esophageal squamous cell carcinoma; Orange column, middle thoracic esophageal squamous cell carcinoma; Gray column, lower thoracic esophageal squamous cell carcinoma