, Asmaa Elzeftawy, Loai Mansour, Abdelrahman Kobtan, Heba Mourad, and Ferial El-Kalla. “Evaluation of the Blood Ammonia Level As a Non-Invasive Predictor for the Presence of Esophageal Varices and the Risk of Bleeding”. Turkish Journal of Gastroenterology 1 30, no. 1 (July 25, 2019): 15–18. Accessed May 22, 2025. https://ojs.avesjournals.com/index.php/tjg1/article/view/510.