title: Reply by authors.
mesh_terms: D000975:Antioxidants / Q000627:therapeutic use*; D006801:Humans; D007248:Infertility, Male / Q000188:drug therapy*; D008297:Male; D055101:Semen Analysis; D014451:Ubiquinone / Q000031:analogs & derivatives*
chemical_list: D000975:Antioxidants; D014451:Ubiquinone