TGM2 and anemia: Because of the recurrent episodes of diarrhea and the presence of mild anemia, she underwent CD screening: both IgA anti-tissue transglutaminase antibodies (tTG-IgA, ELISA kit) and anti-endomysial antibodies (EMA) resulted negative, with normal total IgA levels, while the antibodies against deamidated gliadin peptide IgG (anti-DGP) were slightly positive (12 U/mL, nr.