title: Australia antigen and Down's syndrome.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D003582:Cytogenetics; D004314:Down Syndrome / Q000276:immunology*; D005260:Female; D006509:Hepatitis B / Q000276:immunology*; D006511:Hepatitis B Antigens; D006515:Hepatitis B virus / Q000276:immunology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007621:Karyotyping; D008297:Male; D009030:Mosaicism; D012737:Sex Factors; D014314:Trisomy
chemical_list: D006511:Hepatitis B Antigens