A link to the main funder of the study ..

https://www.mesports.me/

It appears that Signum Biosciences is "all in" on EHT, the compound tested in the study.

Observational coffee use studies, which focused on caffeine but of course would have to also include EHT since that is in coffee, really haven't found too much to get excited about.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3056438/

I see that the Michael J Fox Foundation is somehow associated with this company too. According to the site, they funded the development of EHT by this company. Why isn't the Michael J Fox Foundation jumping up and down about EHT?

In short (probably too late for that ;-) ) I would be looking to studies on PD patients and by independent third parties, if available, before I put too much into EHT. There are numerous compounds that show significant symptomatic relief of PD that should be tried first.