[An epidemiological survey of pollenosis among pear farmers].
D000328:Adult; D000382:Agricultural Workers' Diseases / Q000453:epidemiology* / Q000276:immunology; D005260:Female; D005638:Fruit; D006801:Humans; D006967:Hypersensitivity / Q000453:epidemiology* / Q000276:immunology; D007564:Japan; D008297:Male; D008875:Middle Aged; D011058:Pollen / Q000276:immunology*