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. 2016 Jan 22;11:10. doi: 10.1186/s13000-016-0461-y

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© Shen et al. 2016

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. 3 — Comparisons of mean methylation level of SSTR2 gene between tumor tissues and paired adjacent non-tumor tissues by (a) total and smoking behavior, (b) age, (c) differentiation and (d) clinical stage ^a. ^a: T stands for tumor tissues; N stands for non-tumor tissues. P*: adjusted by age, smoking behavior, differentiation and clinical stage