The HLA-DRB1*03 allele frequency is increased in classical AID, including diabetes mellitus type 154,55, multiple sclerosis61, neuromyelitis optica62, systemic lupus erythematosus63, Graves’ disease64 and Sjögren’s syndrome56, but we observed no association across IgG4-AID, only a decrease in studies on pemphigus. The gene discussed is HLA-DRB1; the disease is pemphigus.