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. 2018 Sep 13;6(9):2325967118795831. doi: 10.1177/2325967118795831

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© The Author(s) 2018

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 License (http://www.creativecommons.org/licenses/by-nc-nd/4.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 1. — The patient is positioned in lateral decubitus. (A) The bony landmarks are highlighted on the skin. (B) An optical instrument and a probe were inserted through the posterior portals. The arrow points to the anterolateral portal.