Syed Shayan Ali, Nazish Butt, Hafiz Haris Altaf, Amanullah Abbasi. “The Etiology and Outcome of Upper Gastrointestinal Bleeding in Patients Presenting to Tertiary Care Hospital, Karachi”. Pakistan Journal of Medical & Health Sciences 16, no. 07 (September 10, 2022): 646. Accessed November 21, 2024. https://mail.pjmhsonline.com/index.php/pjmhs/article/view/2274.