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. 2018 Dec 31;12(Suppl 9):136. doi: 10.1186/s12918-018-0663-x

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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. 3 — Illustration of cross-validation schemes for four scenarios. Each column accounts for a scenario. The first row contains the DTI matrices, in which the entries marked with “?” are the pairs of interest to be tested. Especially, the entries marked with “-” in S4 attend in neither training nor testing phases. The second row contains the topologies of the pairs of interest