[Study on capability of diagnosis in indirect mass survey of the stomach].
D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening; D011127:Polyps / Q000000981:diagnostic imaging*; D011859:Radiography; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging*; D013276:Stomach Ulcer / Q000000981:diagnostic imaging*