DSG3 and acquired polycythemia vera: When considering PV disease area index (PDAI), salivary ELISA anti-Dsg3 demonstrated a moderate association with mucosal PDAI (R = 0.513, p < 0.001), and anti-Dsg1 demonstrated a moderate correlation with body–head–neck PDAI (R = 0.477–0.492, p < 0.001) [31].