Diagnosis of Sliding Hiatal Hernia in Patients With Morbid Obesity: A Comparison of High-resolution Esophageal Manometry and Upper Gastrointestinal Series. - Siriporn Leelakiatpaiboon; Suriya Keeratichananont; Ueaangkun Na suwan; Kamonwon Cattapan; Nisa Netinatsunton (Journal of Neurogastroenterology & Motility, 2025)