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. 2018 Dec 4;13:307. doi: 10.1186/s13018-018-1010-z

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© The Author(s). 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — A 46-year-old man with low back pain for 9 months. a Sagittal T2-weighted MR image of the lumbar spine shows two HIZs at L3/4 and L4/5 (white arrow). b Axial post-discography CT image shows a grade 4 annular disruption at L3/4. Discography produced concordant pain