title: Alzheimer's disease, Down's syndrome, and aging.
mesh_terms: D000368:Aged; D000375:Aging; D000544:Alzheimer Disease / Q000209:etiology* / Q000235:genetics; D003704:Dementia / Q000209:etiology*; D004314:Down Syndrome / Q000150:complications*; D006801:Humans; D008875:Middle Aged