On Nov. 13 a posting from Delana Vaughan about research priorities in PD mentioned about biomarkers; especially liver enzyme P-450 and it's ability to remove neurotoxins. Can anyone give me the name of the group or an individual who is specifically studying this aspect of PD? I suspect that my PD was a result of liver damage from the drug Nizoral. The first vague symptoms of PD began 2 months after the liver problem. Thanks to everyone out there for your help and information that comes across on this network! Margaret Mates [log in to unmask]