Sikder, Md. Shaheen, Tapan Kumar Das, and Kaniz Moula. “Evaluation of Upper Abdominal Pain of Admitted Patients in a Tertiary Hospital”. The Planet 6, no. 01 (August 15, 2022): 67–74. Accessed July 3, 2024. https://bdjournals.org/index.php/planet/article/view/172.