Screening for carcinoma of the stomach and esophagus.
D004938:Esophageal Neoplasms / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000401:mortality; D006801:Humans; D007564:Japan; D008403:Mass Screening; D011859:Radiography; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000401:mortality