For 10 points, name this disease that is treated with a gluten free diet.
Tests for this disease include measurements of  tTGA and AEA levels. The diagnostic biopsy for this disease is analyzed using the Marsh classification, which divides this disease into four stages based on factors like number of intra-epithelial lymphocytes and villous atrophy. Risk factors for this disease include being born by C-section, a finding that correlates with the finding that the makeup of the fecal microflora in patients suffering from this disease differs significantly than that of control subjects. A more serious risk factor is type 1 diabetes, which like this disease is caused by autoreactive T cells. Stage four of this disease is characterized by hypoplasia of the architecture of the small bowel. For 10 points, name this disease that is treated with a gluten free diet.
Tests for this disease include measurements of  tTGA and AEA levels.
{Celiac} disease