title: Blood-group gene localization through a study of mongolism.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001789:Blood Group Antigens; D002648:Child; D002675:Child, Preschool; D004314:Down Syndrome / Q000235:genetics*; D005796:Genes; D006801:Humans; D008875:Middle Aged; D012463:Saliva / Q000032:analysis
chemical_list: D001789:Blood Group Antigens