[Mass screening of gastric cancer in Hokkaido Prefecture].
D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008403:Mass Screening; D011859:Radiography; D013270:Stomach / Q000000981:diagnostic imaging; D013274:Stomach Neoplasms / Q000453:epidemiology*; D013679:Technology, Radiologic