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Post-thaw superoxide production (O2−·: DHE positive) in rhesus macaque spermcryopreserved in the presence or absence of egg yolk (EY) or skimmed milk (SM), with the addition of antioxidants α-tocopherol (Vit E), catalase (CAT), and superoxide dismutase (SOD).
a,bMeans without a common superscript among antioxidant treatments differ (P < 0.05).
