HLA-C and psoriasis: Although two models selected different sets of SNPs from previous ones when SNPs in HCG27 and CCHCR1 were controlled, SNPs rs9468925 in HLA-C/HLA-B and rs2858881 in HLA-DQA2 were repeatedly selected, providing robust evidence for that association of these two classical HLA loci with the development of psoriasis.