Somwung, T., & Srinualnad, S. (2007). Randomized Prospective Study Periprostatic Local Anesthesia During Transrectal Ultrasound Guided Prostate Biopsy at Siriraj Hospital. Insight Urology, 28(1), 36–42. retrieved from https://he02.tci-thaijo.org/index.php/TJU/article/view/253383