Pongpit J. Factors Predicting Mortality Rate within 30 Days of Patients Presenting with Upper Gastrointestinal Bleeding at NongKhai Hospital. Health. Envi. J. [internet]. 2025 Feb. 4 [cited 2025 Apr. 19];3(1):13-26. available from: https://he04.tci-thaijo.org/index.php/hpc8Journal/article/view/2680