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. 2019 Feb 18;8(2):256. doi: 10.3390/jcm8020256

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Subgroup meta-analysis including transoral robotic surgery (TORS) and transoral laser microsurgery (TLM) groups regarding overall Ssurvival estimates (95% confidence interval (CI)). Ev, events; Trt, treatment.