title: Letter: 5-hydroxyindoleacetic acid in Down's syndrome.
mesh_terms: D001772:Blood Cell Count; D001792:Blood Platelets; D002675:Child, Preschool; D002904:Chromosomes, Human, 21-22 and Y; D004314:Down Syndrome / Q000097:blood / Q000235:genetics / Q000378:metabolism* / Q000652:urine; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000097:blood / Q000378:metabolism* / Q000652:urine; D007223:Infant
chemical_list: D006897:Hydroxyindoleacetic Acid