title: Down syndrome.
authors: A M
authors: AM
authors: Barclay
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004314:Down Syndrome / Q000401:mortality*; D006801:Humans; D007223:Infant; D008136:Longevity; D008875:Middle Aged