Yahong Xue, et al. “Acupuncture Versus Biofeedback for Treatment of Functional Anorectal Pain”. Turkish Journal of Gastroenterology, vol. 35, no. 2, Jan. 2024, pp. 83-91, https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/4719.