[Epidemiological features of leukemia in Japan and foreign countries].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007564:Japan; D007938:Leukemia / Q000145:classification / Q000401:mortality*; D008297:Male; D008875:Middle Aged; D012737:Sex Factors