APLN and pulmonary fibrosis: Genes identified from network clusters were further linked to their canonical pathways, which were hepatic fibrosis/hepatic stellate cell activation (p = 1.62E-07), apelin liver signaling (p = 2.95E-07), pulmonary fibrosis idiopathic signaling (p = 3.77E-07), hepatic fibrosis signaling (p = 2.65E-06), tumor microenvironment (p = 3.71E-05), wound healing signaling (p = 1.59E-02), p38 MAPK signaling (p = 2.50E-02), and RHOA signaling (p = 2.42E-02) (Fig. 2C).