Moreover, the levels of human leukocyteantigens (HLAs), including HLA-AW30, HLA-AW31,HLA-A32, HLA-B12, and HLA-B18, were reported tobe elevated in SD patients [22], in addition to reports ofincreased levels of total serum IgA and IgG antibodies [23],suggesting the potential immune mechanisms involved inthe pathogenesis of the disease. Here, HLA-S is linked to Salla disease.