I'd like to strongly recoommend this PDF-Carolinas symposium webcast. IT features two o f the most well-known researchers -both GDNF investagors and on opposite sides of the fence - but both notable for several of the current issues separate from that trial.
Drs.
Mark Stacy
Clive Svendsen

Notice Dr. Stacy asking for courage. Clive Svendsn has done lots and lots - Univ. of Wisconsin. GDNF is mentioned but not the focus at all.

http://pdf.org/webcast/

May have to do it in multiple viewings, but these two are notable guys. They are ready, but most are slow to realize the patient contributing is not a horrific mistake.

Thanks PDF!

paula