From: "Geo." 

"Mike N."  wrote in message
news:pism13t1sf64cu00po4si047th4l08j54b{at}4ax.com...

>>People with Parkinson's disease are less likely to be smokers and coffee
>>drinkers than their healthy siblings,
>
>  Is that because the smokers would have died off early, and thus not have
> been eligible for the study?

All the family member smokers were in another study that linked smoking to
getting Parkinson's...

Geo.

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