i was fact finding for this reply and found the best citation right here. We can be hopeful about this, not clear when they will start. If it does start soon, i have thought about it, but it will be a small phase I and who knows how to qualify.
anyway, Andy Grove is busy, not sure where or doing what but picture him working on delivery systems.. This is an educated guess.
back to this , NIH involvement. looks impressive. i think it says a lot about GDNF's potential.
http://neurotalk.psychcentral.com/thread81930.html
paula