Haarala A, Linjamäki J-A, Tuominen H, Kähönen M. High Resolution Manometry and pH stepup method on the localisation of the lower esophageal sphincter. JGLD [Internet]. 2017 Dec. 1 [cited 2025 Dec. 5];26(4):425-9. Available from: https://jgld.ro/jgld/index.php/jgld/article/view/1015