a study of 138 patients with psoriasis -- 74 with psoriasis alone and 64 with psoriatic arthritis -- revealed a significantly increased frequency of the hla antigens a1 , a28 , b13 , dr7 and mt3 in those with psoriasis alone and of bw39 in those with psoriatic arthritis .
C0033860
psoriasis
C0003872
psoriatic arthritis