title: Langdon Down syndrome and Alzheimer's disease.
mesh_terms: D000328:Adult; D000375:Aging; D001479:Basal Ganglia; D002118:Calcium; D003704:Dementia / Q000209:etiology*; D004314:Down Syndrome / Q000209:etiology*; D006801:Humans; D007501:Iron; D008875:Middle Aged; D009454:Neurofibrils / Q000473:pathology*
chemical_list: D007501:Iron; D002118:Calcium