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. 2017 Jul 5;12:48. doi: 10.1186/s13000-017-0644-1

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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. 3 — Kaplan-Meier survival analysis and statistical analysis according to the individual and co-expression pattern of NGF and HO1 in gastric carcinomas. a Gastric carcinomas were grouped into four sub-groups according to co-expression pattern of NGF and HO1 and subjected to Kaplan-Meier survival analysis for the overall survival and relapse-free survival. NGF⁻/HO1⁻, NGF-negative and HO1-negative. NGF⁺/HO1⁻, NGF-positive and HO1-negative. NGF⁻/HO1⁺, NGF-negative and HO1-positive. NGF⁺/HO1⁺, NGF-positive and HO1-positive. b Receiver operating characteristic curve analysis for the event of overall survival (death of patients) according to the NGF-positivity, HO1-positivity, and co-expression pattern of NGF and HO1 sub-grouping gastric carcinomas into four or three. The area under the curve is largest when the gastric carcinomas are divided to three sub-groups according to co-expression pattern of NGF and HO1 (NGF⁻/HO1⁻, NGF⁺/HO1⁻ or NGF⁻/HO1⁺, and NGF⁺/HO1⁺)