James A, Karunakaran P, Kini R, Thangavel P. Patulous upper esophageal sphincter - an unusual endoscopic finding. Turkish Journal of Gastroenterology [Internet]. 2018 Jan. 1 [cited 2026 Jan. 1];29(1):116-8. Available from: https://turkjgastroenterol.org/index.php/tjg/article/view/3208