Mahawongkajit P, Soonthornkes N. Comparative Effectiveness of Lidocaine Sprays Between Sitting and Supine Position for Patients Undergoing Upper Gastrointestinal Endoscopy: A Prospective Randomized Controlled Trial. AMJAM [Internet]. 2022 Aug. 1 [cited 2025 Apr. 4];22(-):S91. Available from: http://18.141.44.152/index.php/amjam/article/view/1288