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IgG and IgA against gliadin in the sera of 12 children with coeliac disease (CoD) while on a gluten-containing diet (GCD), while on a gluten-free diet (GFD), and in sera of controls (group I, CI; n = 11; group II, CII; n = 11). The OD 450 at serum dilution 1:1600 for IgG and 1:100 for IgA is presented. The geometric mean value for each group is indicated by the horizontal line.
