DSG1 and acquired polycythemia vera: Further studies are needed: (i) to evaluate whether PVF144 may act synergistically with anti-Dsg antibodies using more informative approaches, such as in vitro organ culture or in vivo models; (ii) to assess the possible role of anti-α-catenin autoAbs in pemphigus initiation and evolution in vivo; and (iii) to characterize this novel antigen as a possible target of epitope spreading phenomena in PV.