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. 2019 Nov 14;50(10):1126–1137. doi: 10.1007/s00595-019-01908-4

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© The Author(s) 2019

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.

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Fig. 13 — Questionnaire on numbness of the anterior neck within 1 year of the VANS method versus conventional surgery. (1) Immediately after the operation, (2) less than 6 months after the operation, (3) 7–12 months after the operation