Thirdly, these findings are supported by several positive correlations of endostatin with circulating levels of VE-cadherin (a marker for endothelial damage), the inflammation markers CRP, and IL-6, and the coagulation factor fibrinogen in our COVID-19 cohort, while no correlations were observed in this group of non-COVID-19 patients. The gene discussed is COL18A1; the disease is COVID-19.