Hello all,I have just come across this article.
It deals primarily with Parkinson's disease, and exposure to a particular pesticide, but given that rls is ALSO caused by damage to dopamine receptors (is that correct, Sue, Joolsg ?), it may be of some interest to those on here.
Note that it is not a scientific, peer reviewed article and is just anecdotal:
Here is the link and I hope that it works. Sorry that it needs to be typed in by hand. Ugh.