Association between the Amplification Parameters of the α‐Synuclein Seed Amplification Assay and Clinical and Genetic Subtypes of Parkinson's Disease

α-Synuclein seed amplification assay on cerebrospinal fluid (CSF-αSyn-SAA) has shown high accuracy for Parkinson's disease (PD) diagnosis. The analysis of CSF-αSyn-SAA parameters may provide useful insight to dissect the heterogeneity of synucleinopathies.