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 [Internet]. 2022 Sep. 10 [cited 2024 Nov. 21];16(07):646. Available from: https://mail.pjmhsonline.com/index.php/pjmhs/article/view/2274