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Level-based and circular layout of a cytokine model. After specifying the reference species IL4, the network can be reorganized using level-based and circular layout. (a) The corresponding reference node IL4 is placed at the top level while the other nodes are arranged with respect to their distances to the reference node. (b) The corresponding reference node IL4 is placed at the center while the other nodes are arranged with respect to their distances to the reference node.
