Continued Evaluation of Patients With Parkinson's Disease Who Previously Received BRT-DA01

This is a multicenter study to evaluate the safety and clinical outcomes of BRT-DA01 in subjects with PD who previously received BRT-DA01 in the Phase 1 Study MSK-DA01-101.No investigational therapy will be administered in this study.

All subjects who received BRT-DA01 transplantation in Study MSK-DA01-101 (ie, parent study) will be asked to enroll in Study BRT-DA01-501. Subjects enrolled in this study are to be monitored for safety and clinical outcomes through 5 years post-BRT-DA01 transplantation. For individual participating subjects, the Baseline visit for the BRT-DA01-501 study will be defined as the last observation recorded in the parent study.