Punjani, N., M. . Nayan, K. . Jarvi, K. . Lo, S. Lau, and E. D. Grober. “The Effect of Ethnicity on Semen Analysis and Hormones in the Infertile Patient”. Canadian Urological Association Journal, vol. 14, no. 2, July 2019, pp. 31-5, doi:10.5489/cuaj.5897.