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. 2018 May 2;22(5):373–377. doi: 10.1007/s10151-018-1785-2

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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.

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Fig. 6 — Transanal ultrasound follow-up showing complete healing of the fistula (red arrow) at 30 days after surgery