VDR and psoriasis: We observed a weak association between genotypes Bsml and FokI and psoriasis, and lack of association with ApaI. Therefore, it is important to mention that the absence of a significant association of VDR ApaI polymorphism with psoriasis in the present study may be explained by the number of persons analyzed, which is insufficient for the investigation of rare alleles in the case of comparing Caucasians to Asians.