According to the data published by Meijide et al. in studies that reported a positive association between the aB2GP1 IgA in the autoimmune population, the prevalence of aB2GP1 IgA was about 14% in patients with celiac disease, about 19% in patients with different connective tissue diseases, about 38% in patients with fetal deaths, and ranged from 16 to 58% in patients with SLE, and from 49 to 74% in patients with P-APS [21]. This evidence concerns the gene CD79A and connective tissue disorder.