HLA-DRB1 and acquired polycythemia vera: Specifically, we examined whether vector-derived cadherin-like proteins could represent potential molecular mimics of desmogleins in genetically predisposed individuals.<h4>Methods</h4><i>HLA-DRB1</i> allele frequencies were analyzed in 86 PV patients and 200 healthy controls using PCR-SSOP and Luminex-based genotyping.