Impressive advances have been made in understanding Parkinson's disease over the past few decades. Scientists now have a better understanding of the biochemistry that underlies the illness. They have also found tantalizing hints that it may be caused by a combination of genetic factors and exposure to environmental contaminants.
But that knowledge offers little comfort to the more than 4 million people with Parkinson's worldwide who face the frightening prospect of gradually losing control over their ability to move and...
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