[Epidemiological studies of polycythemia vera in Japan (author's transl)].
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D011087:Polycythemia Vera / Q000453:epidemiology*