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. 2021 Jul 22;19:166. doi: 10.1186/s12916-021-02027-z

Fig. 4.

Fig. 4

Main connected components of the Gaussian graphical model (GGM) network that involve direct associations between features from different omics layers. Blue nodes represent CpG sites. Red and yellow nodes represent serum and urine metabolites, respectively. The opacity of the nodes is dependent on their degree (number of edges connecting a particular feature). The edge thickness was weighted based on the partial correlation coefficients (PCCs) obtained from the GGM