title: The incidence of Down's syndrome in Bucharest. A retrospective survey.
mesh_terms: D001789:Blood Group Antigens; D004314:Down Syndrome / Q000453:epidemiology* / Q000209:etiology / Q000235:genetics; D005260:Female; D006801:Humans; D008423:Maternal Age; D012189:Retrospective Studies; D012383:Romania; D012737:Sex Factors
chemical_list: D001789:Blood Group Antigens