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. 2021 Sep 24;279(1):299–310. doi: 10.1007/s00405-021-07076-x

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — A Forest plot of multivariable overall survival (OS) analysis; survival curves derived from the multivariable OS model showing the marginal effect of the Stage B and of the age C adjusted for the effects of other covariates. Legend: SCC squamous cell carcinoma; TLM transoral laser microsurgery; OPHL open partial horizontal laryngectomy; CTRA crico-tracheal resection and anastomosis; TL total laryngectomy