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. Protein-protein interaction (PPI) network (A) Venn diagram showing common targets of luteolin (3,4,5,7-tetrahydroxyflavone) (LUT) and COVID-19; (B) construction via String 11.5, the node color represented different signaling pathways as shown above; (C) constructed using Cytoscape 3.8.2; the node color had a positive association with its contribution to COVID-19).
