Prevalence and Risk Factors of Helicobacter Pylori in Khat Chewers , Hodeidah , Yemen. RJBAS [Internet]. 2026 Jun. 30 [cited 2026 Oct. 2];5(1):13-9. Available from: https://ojs.abhath-ye.com/index.php/OJSRJBAS/article/view/1018