Declining Prevalence of Helicobacter Pylori Infection- A 13C Urea Breath Test (UBT) Based Study in Symptomatic. Anwer Khan Mod Med Coll J [Internet]. 2019 Nov. 20 [cited 2026 Jun. 29];10(2):121-4. Available from: https://www.banglajol.info/index.php/AKMMCJ/article/view/44120