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. 2017 May 31;13:1744806917710041. doi: 10.1177/1744806917710041

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© The Author(s) 2017

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work 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. — Topographical identification and examples of synapses in laminae III-IV of the rat dorsal horn: (a) A toluidine blue-stained semithin section with a black trapezium indicating the area of the dorsal horn, comprising laminae III-IV, subsequently trimmed to cut ultrathin sections; (b) TEM low magnification of laminae III-IV immunolabeled for GABA_B2; and (c) higher magnifications of axosomatic (1), axodendritic (2), and axo-axonic (3) profiles from the ultrathin section showed in (b). Scale bars: (a) 200 µm; (b) and (c) 250 nm.