CXCL10 and acquired polycythemia vera: Weak positive correlations between the %JAK2V617F and levels of IP-10 and IL-1Rα were confirmed in the PV cohort (IP-10: n = 27, r = 0.392, p = 0.0429; IL-1Rα: n = 27, r = 0.648, p = 0.0003) (Figure 2d,e).