Table 2 shows different laboratory parameters, including white blood cell count (WBC), hemoglobin (Hb), platelet count, INR, PT, aPTT, D-dimer, fibrinogen, CRP, and serum creatinine, across the four ABO blood groups (A, B, AB, and O) in a cohort of 446 COVID-19 patients. This evidence concerns the gene GSTM1 and COVID-19.