you can get it through any quest lab too. it's test #34534. it's a send out for quest to the U of washington so if your local quest lab seems confused about finding that particular test, ask them to please look into it because it really does exist and that really is the number for it :)
grace
You have to pay to post on Terri's forum for her to respond.
However, I believe you can contact her through her clinic Westover Heights, here:
http://www.westoverheights.com/about.html