ashleyk said: "Don't know who this research group is, but they should be put on a fast track to develop this drug and get it out there."

The SOPD blog has done a substantial post on this research project.

Voyager Therapeutics: Phase I clinical trial update | The Science of Parkinson's disease

My understanding of the project is that, rather than developing a drug, what they are developing is a surgical procedure (MRI-guided) to inject a gene-carrying virus into the putamen.