Again, just a brief note. You want cardiomyopathy? Eat your healthy whole grains and start saving for that heart transplant! Or crossing your fingers if you're in the NHS.
Bear in mind that antibody production is far from necessary for gluten damage, so there is no reason why the two antibody negative patients might not have gluten related damage. Also many "non" coeliac people could equally have gluten damage without gut signs.