In the study, a total number of no more than 100 subjects are planned to be enrolled.~Subjects who are eligible for enrollment will be enrolled in the study after signing the informed consent form (ICF) and undergo 3 visits, including the baseline visit (the day of first blood sample collection), visit 1 (day 183 post-enrollment), and visit 2 (day 366 post-enrollment).
The study is a multi-center, observational study to evaluate the feasibility of α-synuclein-related biomarkers and imaging data in the disease diagnosis and prognosis evaluation in Synucleinopathies and healthy subjects.