CXCL9 and COVID-19: Moreover, there were 16 kinds of CCGFs, including HGF, CXCL8/IL-8, CCL7/cP-3, CCL2/McP-1, CXCL9/MIG, CXCL10/IP-10, IL-6, IL-18, IL-2, M-CSF, IL-1Rα, IL-2Rα/CD25, IFN-γ, CC L3/MIP-1α, FGF, and SCF which were abnormally elevated in patients who died from COVID-19.