Amadi, Collins, and Ehimen P. Odum. “Age-Specific Serum Prostate-Specific Antigen References Range Among Healthy Men in Port Harcourt, Nigeria: A Retrospective Hospital-Based Study”. International Journal of Research in Medical Sciences 6, no. 2 (January 24, 2018): 417–421. Accessed January 2, 2026. https://www.msjonline.org/index.php/ijrms/article/view/4358.