[Etiological considerations of chronic and acute gastric ulcer].
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013270:Stomach / Q000473:pathology; D013276:Stomach Ulcer / Q000209:etiology* / Q000473:pathology; D013315:Stress, Psychological