Ahmed, M. M.; Saeed, A.; Ali Masum, A. S. M. H.; Md Mohiuddin, .-.; Rahman, A. Declining Prevalence of Helicobacter Pylori Infection- A 13C Urea Breath Test (UBT) Based Study in Symptomatic. Anwer Khan Mod Med Coll J 2019, 10, 121-124.