“Pre-operative work-up before bariatric surgery: Should ultrasonography and upper gastrointestinal endoscopy be done routinely? ”, Ann Med Res , vol. 26, no. 3, pp. 0408–0412, May 2021, Accessed: May 10, 2025. [Online]. Available: http://www.annalsmedres.org/index.php/aomr/article/view/1336