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. 2016 Aug 16;35:80. doi: 10.1186/s40880-016-0143-x

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© The Author(s) 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. 1 — Prognostic factors affecting postoperative survival of patients with small hepatocellular carcinoma (sHCC) (log-rank test). a Tumor size >2.5 cm was associated with a decrease in overall survival (OS) of patients (P = 0.001). b Tumor size >2.5 cm was associated with a decrease in recurrence-free survival (RFS) of patients (P = 0.002). c Tumor with vascular invasion was associated with a decrease in OS of patients (P < 0.001). d Tumor with vascular invasion was associated with a decrease in RFS of patients (P = 0.002). e Tumor with poor/undifferentiation was not significantly associated with a decrease in OS of patients (P = 0.511). f Tumor with poor/undifferentiation was associated with a decrease in RFS of patients (P = 0.002)