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. 2019 Jul 31;9:702. doi: 10.3389/fonc.2019.00702

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Copyright © 2019 Shiba, Okamoto, Kiyohara, Ohno, Kaminuma, Asao, Ojima, Shirabe, Kuwano and Nakano.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Kaplan-Meier curves of OS (blue line), LC (green line), and PFS (red line) of all patients. Number at risk is shown below the figure. OS, overall survival; LC, local control; PFS, progression-free survival.