Hi there,
we have been to the clinic in Burlington--we found her not helpful at all.
We ordered the very expensive 23 and me kit--and she literally looked at 3 pages out of the 20 and blatantly said " well you need to deal with your tourettes", also "try elimination diet".
ugh--sorry for the bad news.
I recommend the book available here-- as well I have just ordered the "Hemocode" to see what the results are for him.
hopefully that helps.