Dr. O, I see what you mean about there being a more and less thorough test, but could you (attempt) to explain to us lay people the benefit of the more extensive analysis.
1. Is it possible that someone could test negative for both the celiac and the gluten sensitivity genes, say through enterolab's type of testing (only the B1 portion), but still be positive on the A1 portion?
2. If someone is positive on one or both of the B1 portion of their genes, then what additional significance does knowing the A1 portion have?