[Some problems in recurrence of gastric ulcer].
D000328:Adult; D000368:Aged; D003289:Convalescence; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012008:Recurrence; D013276:Stomach Ulcer / Q000000981:diagnostic imaging / Q000401:mortality; D013997:Time Factors