<qa>  What is the first time a patient has been on the site PI?6. Patient must express a willingness and intent to remain off of all medications that could affect parkinsonism for the first 6 months of the study without first informing the site PI. Starting an anti-Parkinson medication does not necessarily disqualify a patient from continuing with the study. After the initial 6 months of participation, the patients will be allowed to start anti-Parkinson medications. 