AB-1005 Long-Term Follow-up Study

Long-Term Safety and Efficacy Follow-up of AB-1005 Gene Transfer Study Participants With Parkinson's Disease or Multiple System Atrophy

This is an observational, long term, follow-up study for participants with Parkinson's disease (PD) or Multiple System Atrophy-Parkinsonian subtype (MSA-P) who participated in prior interventional studies with AB-1005. It is intended to better understand the long-term safety of AB-1005, how well tolerated it is and how long lasting the effects are.

Inclusion Criteria:

• PD and MSA-P participants that are or were enrolled in an interventional AB-1005 study and provide informed consent

Exclusion Criteria:

• There are no exclusion criteria