Khat chewing is a risk factor of duodenal ulcer.
Raja'a
Y A
YA
Noman
T A
TA
al Warafi
A K
AK
al Mashraki
N A
NA
al Yosofi
A M
AM
D016022:Case-Control Studies; D029754:Catha / Q000009:adverse effects*; D015986:Confounding Factors, Epidemiologic; D004381:Duodenal Ulcer / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D016481:Helicobacter Infections / Q000150:complications; D016480:Helicobacter pylori; D006801:Humans; D008297:Male; D012307:Risk Factors; D019966:Substance-Related Disorders / Q000150:complications*; D011795:Surveys and Questionnaires; D015006:Yemen / Q000453:epidemiology