Kurniawan A, Simadibrata M, Yuriandro P, Chen LK. Approach for Diagnostic and Treatment of Achalasia. InaJGHE [Internet]. 2013 Sept. 19 [cited 2026 Oct. 22];14(2):109-16. Available from: https://ina-jghe.com/index.php/jghe/article/view/409