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Agarwal, A., Virk, G., Ong, C. and du Plessis, S. S. 2014. Effect of oxidative stress on male reproduction. <i>World J. Mens Health<\/i> 32: 1\u201317.","DOI":"10.5534\/wjmh.2014.32.1.1"},{"key":"2","doi-asserted-by":"crossref","unstructured":"2. Ahmadi, S., Bashiri, R., Ghadiri-Anari, A. and Nadjarzadeh, A. 2016. Antioxidant supplements and semen parameters: An evidence based review. <i>Int. J. Reprod. Biomed. (Yazd)<\/i> 14: 729\u2013736.","DOI":"10.29252\/ijrm.14.12.729"},{"key":"3","doi-asserted-by":"crossref","unstructured":"3. Aitken, R. J. and Baker, M. A. 2004. Oxidative stress and male reproductive biology. <i>Reprod. Fertil. Dev.<\/i> 16: 581\u2013588.","DOI":"10.1071\/RD03089"},{"key":"4","doi-asserted-by":"crossref","unstructured":"4. Aitken, R. J., Clarkson, J. S., Hargreave, T. B., Irvine, D. S. and Wu, F. C. 1989. Analysis of the relationship between defective sperm function and the generation of reactive oxygen species in cases of oligozoospermia. <i>J. 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Clinical and spermatological findings in male dogs with acquired infertility: A retrospective analysis. <i>Andrologia<\/i> 52: e13802.","DOI":"10.1111\/and.13802"},{"key":"14","doi-asserted-by":"crossref","unstructured":"14. Fawcett, D. W. 1975. The mammalian spermatozoon. <i>Dev. Biol.<\/i> 44: 394\u2013436.","DOI":"10.1016\/0012-1606(75)90411-X"},{"key":"15","unstructured":"15. Fontbonne, A. 2011. Infertility in male dogs: recent advances. <i>Rev. Bras. Reprod. Anim., Belo Horizonte<\/i> 35: 266\u2013273."},{"key":"16","doi-asserted-by":"crossref","unstructured":"16. Geva, E., Lessing, J. B., Lerner-Geva, L. and Amit, A. 1998. Free radicals, antioxidants and human spermatozoa: clinical implications. <i>Hum. Reprod.<\/i> 13: 1422\u20131424.","DOI":"10.1093\/oxfordjournals.humrep.a019709"},{"key":"17","doi-asserted-by":"crossref","unstructured":"17. Groneberg, D. A., Kindermann, B., Althammer, M., Klapper, M., Vormann, J., Littarru, G. P. and D\u00f6ring, F. 2005. Coenzyme Q10 affects expression of genes involved in cell signalling, metabolism and transport in human CaCo-2 cells. <i>Int. J. Biochem. Cell Biol.<\/i> 37: 1208\u20131218.","DOI":"10.1016\/j.biocel.2004.11.017"},{"key":"18","doi-asserted-by":"crossref","unstructured":"18. Jeulin, C., Soufir, J. C., Weber, P., Laval-Martin, D. and Calvayrac, R. 1989. Catalase activity in human spermatozoa and seminal plasma. <i>Gamete Res.<\/i> 24: 185\u2013196.","DOI":"10.1002\/mrd.1120240206"},{"key":"19","doi-asserted-by":"crossref","unstructured":"19. Kal\u00e9n, A., Appelkvist, E. L., Chojnacki, T. and Dallner, G. 1990. Nonaprenyl-4-hydroxybenzoate transferase, an enzyme involved in ubiquinone biosynthesis, in the endoplasmic reticulum-Golgi system of rat liver. <i>J. Biol. Chem.<\/i> 265: 1158\u20131164.","DOI":"10.1016\/S0021-9258(19)40172-5"},{"key":"20","doi-asserted-by":"crossref","unstructured":"20. Kawakami, E., Hori, T. and Tsutsui, T. 1998. Changes in semen quality and in vitro sperm capacitation during various frequencies of semen collection in dogs with both asthenozoospermia and teratozoospermia. <i>J. Vet. Med. Sci.<\/i> 60: 607\u2013614.","DOI":"10.1292\/jvms.60.607"},{"key":"21","doi-asserted-by":"crossref","unstructured":"21. Kawakami, E., Tsutsui, T., Yamada, Y. and Yamauchi, M. 1984. Cryptorchidism in the dog: occurrence of cryptorchidism and semen quality in the cryptorchid dog. <i>Nippon Juigaku Zasshi<\/i> 46: 303\u2013308.","DOI":"10.1292\/jvms1939.46.303"},{"key":"22","doi-asserted-by":"crossref","unstructured":"22. Kawakami, E., Kobayashi, M., Hori, T. and Kaneda, T. 2016. Therapeutic effects of vitamin E supplementation in 4 dogs with poor semen quality and low superoxide dismutase activity in seminal plasma. <i>J. Vet. Med. Sci.<\/i> 77: 1711\u20131714.","DOI":"10.1292\/jvms.15-0294"},{"key":"23","doi-asserted-by":"crossref","unstructured":"23. 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Relationship between sperm cell ubiquinone and seminal parameters in subjects with and without varicocele. <i>Andrologia<\/i> 30: 1\u20134.","DOI":"10.1111\/j.1439-0272.1998.tb01374.x"},{"key":"26","doi-asserted-by":"crossref","unstructured":"26. Mancini, A., De Marinis, L., Oradei, A., Hallgass, M. E., Conte, G., Pozza, D. and Littarru, G. P. 1994. Coenzyme Q10 concentrations in normal and pathological human seminal fluid. <i>J. Androl.<\/i> 15: 591\u2013594.","DOI":"10.1016\/0098-2997(94)90035-3"},{"key":"27","doi-asserted-by":"crossref","unstructured":"27. Mazzilli, F., Rossi, T., Marchesini, M., Ronconi, C. and Dondero, F. 1994. Superoxide anion in human semen related to seminal parameters and clinical aspects. <i>Fertil. Steril.<\/i> 62: 862\u2013868.","DOI":"10.1016\/S0015-0282(16)57017-4"},{"key":"28","doi-asserted-by":"crossref","unstructured":"28. Mellors, A. and Tappel, A. L. 1966. The inhibition of mitochondrial peroxidation by ubiquinone and ubiquinol. <i>J. Biol. 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Role of reactive oxygen species in male infertility. <i>Urology<\/i> 48: 835\u2013850.","DOI":"10.1016\/S0090-4295(96)00313-5"},{"key":"38","doi-asserted-by":"crossref","unstructured":"38. Sikka, S. C. 2001. Relative impact of oxidative stress on male reproductive function. <i>Curr. Med. Chem.<\/i> 8: 851\u2013862.","DOI":"10.2174\/0929867013373039"},{"key":"39","doi-asserted-by":"crossref","unstructured":"39. Sohal, R. S. 2004. Coenzyme Q and vitamin E interactions. <i>Methods Enzymol.<\/i> 378: 146\u2013151.","DOI":"10.1016\/S0076-6879(04)78010-6"},{"key":"40","doi-asserted-by":"crossref","unstructured":"40. Sugiyama, S., Kitazawa, M., Ozawa, T., Suzuki, K. and Izawa, Y. 1980. Anti-oxidative effect of coenzyme Q10. <i>Experientia<\/i> 36: 1002\u20131003.","DOI":"10.1007\/BF01953847"},{"key":"41","doi-asserted-by":"crossref","unstructured":"41. Takeshima, T., Usui, K., Mori, K., Asai, T., Yasuda, K., Kuroda, S. and Yumura, Y. 2020. Oxidative stress and male infertility. <i>Reprod. 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