Phoojaroenchanachai, Rienporn, Tassanee Hongsupangpunt, and Oaythip Savetprasart. “A Clinical Study on the Efficacy and Tolerability of the Ultrasonic Therapy by Using Ultrasonic Machines of the Thailand Institute of Scientific and Technological Research”. Siriraj Medical Journal 59, no. 4 (July 1, 2007): 184–190. Accessed May 2, 2024. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246099.