Perveen, I. ., M. . Saha, and M. Q. . Hasan. “Is There Decreasing Prevalence of Helicobacter Pylori Infection in Patients With Dyspepsia?”. Journal of Chittagong Medical College Teachers' Association, vol. 33, no. 1, June 2022, pp. 97-102, doi:10.3329/jcmcta.v33i1.67265.