Parkinson's: Neurons destroyed by 3 simultaneous strikes
April 29, 2009
In a study that reveals the clearest picture to date of neuron death in Parkinson's disease, researchers at Columbia University Medical Center have found that a trio of culprits acting in concert is responsible for killing the brain cells.

http://www.physorg.com/news160228509.html

Love that last sentence -- at least it's true instead of we'll have it in five years.

" Drs. Sulzer and Mosharov are currently working on genetic therapies that could accomplish this feat, but caution that it will be years before any such treatment is ready for clinical trials, if ever."