TY  - GEN
AU  - Raja'a,Y A
AU  - Noman,T A
AU  - al Warafi,A K
AU  - al Mashraki,N A
AU  - al Yosofi,A M
TI  - Khat chewing is a risk factor of duodenal ulcer
SN  - 1020-3397
PY  - 2003///0502
KW  - Case-Control Studies
KW  - Catha
KW  - adverse effects
KW  - Confounding Factors, Epidemiologic
KW  - Duodenal Ulcer
KW  - epidemiology
KW  - Female
KW  - Helicobacter Infections
KW  - complications
KW  - Helicobacter pylori
KW  - Humans
KW  - Male
KW  - Risk Factors
KW  - Substance-Related Disorders
KW  - Surveys and Questionnaires
KW  - Yemen
N1  - Publication Type: Letter
ER  -