TGM2 and cranioectodermal dysplasia: Significant increases in serum antibody concentrations to DGP were detected in children who developed CeD at the time of diagnosis (Δ IgGDGP +95.62 ISU (SD ± 45.24), p < 0.0001, compared to the last follow-up sample before anti-TG2 seroconversion (Supplementary Figure S1A).