" from a research point of perspective , this is the first event we cannot identify this appears to be standard white ' s type cases before people acquire symptoms , " says pepper clinic neuroscientist david farrer . " we know if someone inherits the mutation they are going to get barrett ' s disorders . " the mutation was discovered by sequencing the lrrk2 mutant in individuals with parkinson ' s from the us , norway , hungary and romania .
A genetic mutation has been linked with Parkinson's disease.