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Background
Substantia nigra (SN) free water has been suggested as a good surrogate marker in Parkinson's disease (PD). However, its usefulness for diagnosing prodromal PD (pPD) and monitoring disease progression warrants further validation.
Objective
The aim was to investigate SN free water values across prodromal and clinical stages of PD.
Methods
Four groups were enrolled in this study: 48...
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