TGM2 and celiac disease: The meta-analysis on the sample that included patients with celiac disease (CeD) who had not adhered to a GFD, revealed that the ELISA for IgA- tTG (SE: 0.90, SE 95% CrI: 0.71–0.99; SP: 0.14, 95% CrI: 0.03–0.44) and IIF for IgA-EMA (SE: 0.89, 95% CrI: 0.32–0.99; SP: 0.13, 95% CrI: 0.01–0.71) demonstrated high sensitivity but low specificity.