I'm not sure how long it's been around, but my GI sure seems to think it's a worthwhile test. You might want to get pre-approval from your insurance company first, though. I found out the hard way that my insurance company wouldn't cover it. 500 bucks... oy.
Just trying to be a "Regular Member".
Entocort 9 mg/day, Prednisone 20 mg/day, Pentasa 4 gm/day, started Humira 1/22/08, started 100 mg of Azasan (Imuran) 2/20/08. I'm convinced that Prednisone is the root of all evil, and primarily responsible for global warming.