After reading the posting about GDNF trials being carried on, I phone my Pallid.neuro in Toronto to ask about this. His comments: (out of context) These tests are a result of Monkey testing which showed promise We did the first human test a few weeks ago GDNF is a protein which we hope will stop the death of healthly cells thereby causing PD. At this time we are only testing humans for safety and side effects. In about 6 months we will see what if any results were gleaned from the first test patients. In about 12+ months all the test results will be available to us to determine if we go on with this. Because they are trying to keep a narrow window on test patients symptoms and past history, any patient having done PD brain surgery (pallidot) is NOT a canditate for these tests. (if you're thinking about volunteering remember, these tests are for safety and side effects) He sounded quite upbead about the possibilities...so lets keep fingers crossed. Joyce