Angkurawaranon, Chotirot. “Per-oral Endoscopic Myotomy for Treatment of Achalasia, A Single Center Case Series”. Journal of the Association of General Surgeons of Thailand under the Royal of Patronage of HM the King 11, no. 1 (June 7, 2026): 14–26. accessed September 20, 2026. https://he02.tci-thaijo.org/index.php/agstjournal/article/view/279067.