title: Macrocytosis and cognitive decline in Down's syndrome.
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging; D003071:Cognition; D004314:Down Syndrome / Q000097:blood*; D004913:Erythrocytes, Abnormal / Q000473:pathology*; D006801:Humans; D008875:Middle Aged