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(a) A two-dimensional factor loading plot of the studied markers. 8-OHdG—8-hydroxy-2′-deoxyguanosine; CAT—catalase; NT—nitrotyrosine; SOD—superoxide dismutase; TAC—total antioxidant capacity; C (subscript)—cellular; SP (subscript)—in seminal plasma. (b) The plot of sample distribution with normal and abnormal TUNEL values in men after COVID-19 and without it.
