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. 2016 Feb 29;21:7. doi: 10.1186/s40001-016-0202-4

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© Xin et al. 2016

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. 7 — Representative lateral radiographs before surgery (a) and 6 months after surgery (b). Three experimental levels showed obvious and various degrees of disc space narrowing after surgery. Osteophyte formation (white asterisk) was seen at the margin of the vertebral bodies. The arrows indicate the operated disc