DSG1 and acquired polycythemia vera: Furthermore, anti-Dsg antibodies can be absent in the active stage of disease but present in PV patients during remission [13], [14], [15], [16], [17], [18], patients with unrelated medical conditions, and healthy subjects, including relatives of PV patients [17], [19], [20], [21], [22], [23], [24], [25], [26].