title: Prevalence of hepatitis associated antigen (HAA) in an institution for the mentally retarded.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000410:Alanine Transaminase / Q000097:blood; D000906:Antibodies / Q000032:analysis; D002648:Child; D002675:Child, Preschool; D004314:Down Syndrome; D006511:Hepatitis B Antigens; D006515:Hepatitis B virus; D006801:Humans; D005779:Immunodiffusion; D007223:Infant; D008607:Intellectual Disability / Q000276:immunology*; D012737:Sex Factors; D013997:Time Factors
chemical_list: D000906:Antibodies; D006511:Hepatitis B Antigens; D000410:Alanine Transaminase