Perveen, Irin, Madhusudan Saha, and Md Quamrul Hasan. “Is There Decreasing Prevalence of Helicobacter Pylori Infection in Patients With Dyspepsia?”. Journal of Chittagong Medical College Teachers’ Association 33, no. 1 (June 30, 2022): 97–102. Accessed October 1, 2025. https://www.banglajol.info/index.php/JCMCTA/article/view/67265.