"Certain HLA alleles are found in Chinese patients with psoriasis (HLA-A*30 -Cw*06 -DR*07) and psoriatic arthritis (PsA) (HLA-B*27). Psoriasis patients with the HLA-B*27 and/or -Cw*12 may have higher risk of developing PsA; Observational study of gene-disease association. (HuGE Navigator)"xsd:string