No significant differences were observed between two groups regarding gender, BMI, smoking history, surgical history within 3 months, CVD, DM, CLD, CRD, AID, WBC, Cr, CK, Fib, IL-6, use of anti-COVID-19 drugs and the proportion of patients with bleeding events (P > 0.05) (Table 1). Here, IL6 is linked to COVID-19.