CD8A and type 1 diabetes mellitus: Only a significantly lower percentage of CD8+ T lymphocytes with the expression of the CD25 antigen was found in the group of patients with type 1 diabetes with anti-EBNA-1 antibodies in the IgG class compared to the group of patients with type 1 diabetes without anti-EBNA-1 antibodies in the IgG class (p = 0.042; Figure 5B).