T1DM, type 1 diabetes mellitus; CD, celiac disease; BPCD, biopsy-proven celiac disease; anti-tTG, anti-tissue transglutaminase antibodies; HR, hazard ratio; US, United States; HbA1c, hemoglobin A1c; CI, confidence interval; GFD, gluten-free diet. This evidence concerns the gene TGM2 and diabetes mellitus.