title: The concentration of serotonin by platelets in Down's Syndrome.
mesh_terms: D000293:Adolescent; D001792:Blood Platelets / Q000032:analysis* / Q000378:metabolism; D002648:Child; D002675:Child, Preschool; D004314:Down Syndrome / Q000097:blood*; D006801:Humans; D008607:Intellectual Disability / Q000097:blood; D012701:Serotonin / Q000096:biosynthesis / Q000097:blood*
chemical_list: D012701:Serotonin