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Down syndrome, a genetic disease caused by trisomy on 21 pairs of chromosomes, in which mental retardation is combined with a peculiar appearance of the patient. In scientific work, 120 children were examined, of which 75 (62.5%) were boys, 45 (37.5%
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07f287c1e59a65ae7f84caae37bfd7c6
