KDR and essential thrombocythemia: ET patients displayed positive correlations between hemoglobin concentration with IL-6Ra, IL-1β, IL-10, IL-18 and G-CSF; red blood cell count with IL-6Ra and VEGF-R2; hematocrit with GM-CSF and IL-1β; white blood cell count with IL-6Ra; and platelet count with VEGF-R2 and CCL5 (Table S7).