Aspects of gastric ulceration in Nigeria.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D009549:Nigeria; D012737:Sex Factors; D012923:Social Class; D013276:Stomach Ulcer / Q000453:epidemiology*