Here's a link to the article I mentioned in my earlier post:
http://www.aolhealth.com/2010/07/19/study-gluten-free-food-often-contaminated/?icid=main%7Chtmlws-main-n%7Cdl5%7Clink4%7Chttp%3A%2F%2Fwww.aolhealth.com%2F2010%2F07%2F19%2Fstudy-gluten-free-food-often-contaminated%2F&sms_ss=facebook