title: Australia antigen and Down's syndrome.
mesh_terms: D000328:Adult; D002675:Child, Preschool; D002869:Chromosome Aberrations; D003168:Complement Fixation Tests; D004314:Down Syndrome / Q000235:genetics / Q000276:immunology*; D005260:Female; D006511:Hepatitis B Antigens; D006515:Hepatitis B virus / Q000276:immunology*; D006801:Humans; D008297:Male; D012737:Sex Factors
chemical_list: D006511:Hepatitis B Antigens