I personally don't like all these conspiracy theories. A company that can bring a disease modifying med for PD will benefit hugely. Why would they cancel such a med ? Doesn't make any sense.

I think it is normal that the nose cell therapy will not come into market as long as they only show to help 35 % of rats. This is stem cell therapy. I guess you have to drill in the skull and inject these cells with a needle. This is a really dangerous therapy and if it doesn't help 65 % of people (probably even more as the 35 % is on rats) than I don't think this therapy will ever be a succes. Can you imagine going to do brain surgery if you have 65 % chance of not succeeding ? I probably wouldn't bother.