1. Natural history and epidemiology ofHelicobacter pyloriinfection
2. Prevalence of gastric precancerous lesions in Ardabil, a high incidence province for gastric adenocarcinoma in the northwest of Iran
3. Massarrat S, Saberi-Firoozi M, Soleimani A, Himmelmann GW, Hitzges M, Keshavarz H. Peptic ulcer disease, irritable bowel syndrome and constipation in two populations in Iran. Eur J Gastroenterol Hepatol 1995;7:427-433.
4. Bani-Hani KE, Hammouri SM. Prevalence of Helicobacter pylori in Northern Jordan. Endoscopy based study. Saudi Med J 2001;22:843-847.
5. Bener A, Uduman SA, Ameen A, Alwash R, Pasha MA, Usmani MA, AI-Naili SR, Amiri KM. Prevalence of Helicobacter pylori infection among low socio-economic workers. J Commun Dis 2002;34:179-184.