Poungvarin, N. ., Y. . Nilanont, N. . Prayoonwiwat, and V. . Senanarong. “Hemifacial Spasm Treated With Botulinum Toxin Injection : A Ten-Year Experience at Siriraj Hospital”. Siriraj Medical Journal, vol. 53, no. 1, Aug. 2020, pp. 1-7, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/244019.