HLA-DRB1 and pemphigus foliaceus: The sporadic form of PF is most common in Europe and the United States and associated with HLA DRB1*0102 and 0404, but the endemic form (i.e., fogo selvage) occurs in certain regions of Brazil and Morocco with the same susceptibility gene (HLA DRB1*0102; Moraes et al., 1991).