While all demographic, clinical, behavioral, and motor variables did not differ, PD-MCI-Aβ+ showed a trend for higher age of motor's symptoms onset, suggesting that extracellular β-amyloid deposition is an age-related pathological marker ( 33 ).
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Quantification of Brain β-Amyloid Load in Parkinson's Disease With Mild Cognitive Impairment: A PET/MRI Study.
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