Figure 6From: Insights into the pathogenesis of axial spondyloarthropathy from network and pathway analysisIllustration of k -core and k -core layer. The 1-core layer are the red nodes, the 2-core layer are green. The 1-core is the whole graph, the 2-core is subgraph consisting of green and blue nodes and the 3-core is the subgraph consisting of blue nodes.Back to article page