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. 2015 Apr 2;10:17. doi: 10.1186/s13000-015-0249-5

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© Hamanaka et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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Recurrence-free survival according to p-Stage and presence of tumor vessel invasion (TVI). A) Comparison of IA(−) (n = 243), IA(+) (n = 56), and IB (n = 168). B) Comparison of IA(−) (n = 243), IA(+) (n = 56), IB(−) (n = 103), and IB(+) (n = 65). Five-year recurrence-free survival rate (%): IA(−), 97.9%; IA(+), 79.7%; IB, 81.3%; IB(−), 81.3%; and IB(+), 67.7%.