title: Translocation Down's syndrome in Japan: its frequency, mutation rate of translocation and parental age.
mesh_terms: D000328:Adult; D000367:Age Factors; D002869:Chromosome Aberrations; D004314:Down Syndrome / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D009154:Mutation; D010290:Parents; D010375:Pedigree