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Alzheimer's Disease
Depressive Disorder
Dementia
Neuropsychological Tests
Psychiatric Status Rating Scales
Age Factors
Drug Dose Response Relationship
Scopolamine
Apolipoproteins E
Selegiline
Apolipoprotein E4
Piperazines
Amyloid beta-Peptides
Double-Blind Method
Tomography, Emission-Computed
Cognition
Memory
Attention
Brain
Behavior
Co-Publications
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