CD79A and selective IgA deficiency disease: Pallav et al. reported the presence of another autoimmunity in 67% of SIgAD-CeD compared to 23.5% of the only CeD control [200], while Chow et al. indicated the second autoimmunity in 29% of antibody-deficient patients compared with 12% of CeD patients with normal IgA levels [215].