Cigarette smoking and duodenal ulcer disease in Singapore.
I L
IL
Yap
S J
SJ
LaBrooy
R
R
Guan
J Y
JY
Kang
D000328:Adult; D004381:Duodenal Ulcer / Q000188:drug therapy / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D012008:Recurrence; D012907:Smoking / Q000009:adverse effects*