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. 2018 Jun 10;8(8):847–859. doi: 10.1177/2192568218779988

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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 5. — Sulfated glycosaminoglycan (S-GAG) content (% dry weight). (A) NP1 GAG is significantly lower in APN-injured than drill-injured discs, which is in turn less than control discs. (B) NP2 demonstrates the same relationship with APN-injured discs lower than drill-injured discs (P < .05), which in turn are less than control discs. (C) NP Total GAG and (D) total disc GAG demonstrates the same series of relationships. APN, annulotomy and partial nucleotomy. *P < .05, **P < .005.