NOTCH4 and psoriasis: Notably, HLA-C∗06:02, HLA-C∗07:04, HLA-B amino acid position 67, and HLA-DPB1∗05:01 (strong linkage disequilibrium with DPB1-F35L) were shared susceptibility variants between PFH and SP, while other variants (NOTCH4:G511S and TAP2∗01:03 for PFH, C∗01:02, B-Y116S, B-Q70K, A-I95V, and BTNL2:R281K for SP) showed specific associations with one of two psoriasis subtypes.