Sittiwicheanwong, C., K. Prasopsanti, S. Ratchanon, J. Opanuraks, K. Tantiwongse, and C. Bunyaratavej. “Outcomes of Transrectal Ultrasound- Guided Biopsy of Prostate Using Chulalongkorn Regimen”. Insight Urology, vol. 28, no. 1, June 2007, pp. 30-35, https://he02.tci-thaijo.org/index.php/TJU/article/view/253382.