Similarly, DRB1*03 is also a susceptible allele for various other autoimmune disorders such as autoimmune thyroiditis (27), PR3-ANCA-associated vasculitis (28), systemic lupus erythematosus, multiple sclerosis, and myasthenia gravis (29). The gene discussed is HLA-DRB1; the disease is anti-neutrophil cytoplasmic antibody-associated vasculitis.