" from a research perspective of view , this is the fifth where we better isolate what looks to be typical d ' s disease events before people development dementia , " says mayo center neuroscientist matthew farrer . " we know if someone recovers the mutation they are going to get gardner ' s disease . " the protein was discovered by examining the lrrk2 genome in families with parkinson ' s from the us , switzerland , india and polish .
A genetic mutation has been linked with Parkinson's disease.