Raja'a, Y A <br/><br/>
Khat chewing is a risk factor of duodenal ulcer.  [electronic resource] 

 -  Eastern Mediterranean health journal = La revue de sante de la Mediterranee orientale = al-Majallah al-sihhiyah li-sharq al-mutawassit  May 2001 
 - 568-70 p.  digital 
<br/><br/> Publication Type: Letter 
<br/><br/><label>ISSN: </label>1020-3397 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Case-Control Studies<br/>Catha--adverse effects<br/>Confounding Factors, Epidemiologic<br/>Duodenal Ulcer--epidemiology<br/>Female<br/>Helicobacter Infections--complications<br/>Helicobacter pylori<br/>Humans<br/>Male<br/>Risk Factors<br/>Substance-Related Disorders--complications<br/>Surveys and Questionnaires<br/>Yemen--epidemiology