A study by Cheh et al. [34] also suggests that allele (HLA)-DRB1 * 16:02) is associated with the pathomechanism of many autoimmune diseases such as systemic lupus erythematosus, anti-N-methyl-d-aspartate receptor (NMDAR) encephalitis, Graves’ disease, myasthenia gravis, neuromyelitis optica and antibody-associated systemic vasculitis with microscopic polyangiitis (AASV-MPA) however, it is not associated with type 1 AIH, multiple sclerosis or rheumatoid arthritis. Here, HLA-DRB1 is linked to microscopic polyangiitis.