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. 2015 Apr 24;13:162. doi: 10.1186/s12957-015-0570-1

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© Niitsu 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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Overall survival between the USC and PTR groups. Median survival times were 13.4 and 23.9 months in USC and PTR, respectively, and overall survival was not significantly different in the two groups. USC: up-front systemic chemotherapy group. PTR: primary tumor resection group. HR: hazard ratio. CI: confidence interval.