This one hits close to home. I had a very close family member die because of a Parkinson-like decease not long ago. He had the misfortune of inhaling quite a bit of herbicide after dropping a bag in an enclosed space and ~10 years later he got the decease. Since there was no history of Parkinson or Parkinson-like deceases in the family history, the doctors conclusion was that it must have been a toxic induced decease (not sure how to pronoun this exactly) and the large amount of herbicide inhale in that day was probably the cause.