HLA-B and psoriasis: Additionally, the authors identified several other HLA alleles, such as HLA-B*15:01g, B*57:01, B*57:02g, B*13:02g, B*38:01g, B*37:01g, C*01:02g, C*18:01g, C*12:03g, DRB1*01:02g and DRB1*04:08g which were associated with an increased risk of psoriasis.