Akhtar MN, Tayyib A, Tasneem T, Butt AR. ABO Blood Group in Patients with Peptic Ulcer Disease: Association with Secretor Status. Annals KEMU [Internet]. 2016 Jul. 11 [cited 2024 May 4];9(3). Available from: https://annalskemu.org/journal/index.php/annals/article/view/1351