I have heard of this...but up until recently I believe it was cost prohibitive...at least here in the states.
Now however, I believe that in some cases the testing is covered, so it is definitely worth asking about
Here is one example of a company that offers this testing:
Best wishes on your best Rx quest...hope this give you some good direction!
"Courage is not the abscence of fear, it is feeling afraid and doing it anyway!"
"Worrying does not empty tomorrow of its troubles...it empties today of its strength."
Corrie Ten Boom
Panic Syndrome recovery due to CBT