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. 2014 Sep 23;5:447. doi: 10.3389/fimmu.2014.00447

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Copyright © 2014 Walker, Holt, Anderson, Teo, Sly, Holt and Inouye.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Representations of directed networks. (A) Tabular and graphical (left and right, respectively) displays of directional flow between variables. (B) Graph showing variations in strength and sign of effects between variables. The flattened edges indicate negative relationships. (C) Directed acyclic (DAG) and directed cyclic graphs (left and right, respectively). (D) A dynamic Bayesian network where edges are only between subsequent time points.