Leewansangtong, Sunai. “Do Aging Thai Males Need to Have Prostate-specific Antigen Testing?”. Siriraj Medical Journal 53, no. 6 (June 1, 2001): 376–377. accessed August 30, 2026. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/265028.