Relative expression levels of the tested genes in JAK2-mutated and JAK2-nonmutated patients by qRT-PCR. Relative gene expression levels were measured in granulocytes (A) and platelets (B) of patients with and without JAK2 mutation. *P ≤ .05, **P ≤ .01, ***P ≤ .001. Cont, healthy controls (n = 28); Neg, patients without JAK2 mutation (n = 7); Pos, patients with JAK2 mutation (n = 51; 1 patient with JAK2 exon 12 mutation).