ALLWIN JAMES; PREMKUMAR KARUNAKARAN; RATNAKAR KINI; PUGAZHENDHI THANGAVEL. Patulous upper esophageal sphincter - an unusual endoscopic finding. Turkish Journal of Gastroenterology, [S. l.], v. 29, n. 1, p. 116–118, 2019. Disponível em: https://tjg.avesjournals.com/index.php/tjg/article/view/3496. Acesso em: 16 jul. 2025.