Erratum

Baseline levels of tissue factor (TF), CD62P, CD41, and CD42b on the surface of platelets. The expression of platelet TF, CD62P, CD41, and CD42b were evaluated in whole blood by flow cytometry. Results are reported as the percentage of platelets positive for TF and CD62P, or as mean fluorescence intensity (MFI) arbitrary units for CD41 and CD42b. The results in essential thrombocythemia (ET) patients are shown according to JAK2 mutational status and as overall ET group. Wt = wild-type. ^∗p < 0.01 vs controls; ^∗∗p < 0.01.

Platelet surface markers after stimulation in the PFA-100 system. Platelets in the blood of essential thrombocythemia (ET) patients and control subjects were stimulated with either adenosine diphosphate (ADP; black bars) or epinephrine (EPI; striped bars) in the PFA-100 system, and the expression of tissue factor (TF), CD62P, CD41, and CD42b on the platelet surface was evaluated by flow cytometry. Results were compared to the baseline (open bars). The analysis of the results for the ET patients is reported according to JAK2 mutational status. Wt = wild-type; ET = overall ET group. ^∗p < 0.01 vs baseline; ^∗∗p < 0.01.

Polymorphonuclear leukocytes (PMN)/platelet aggregates. The levels of PMN/platelet aggregates in essential thrombocythemia (ET) patients and healthy subjects were evaluated in whole blood by flow cytometry as the percentage of either CD11b/CD41 or CD11b/CD62P double-positive PMN. The results in the ET group are reported according to JAK2 mutational status. Wt = wild-type; ET = overall ET group. ^∗p < 0.01 vs controls; ^∗∗p < 0.01.

Polymorphonuclear leukocytes (PMN) surface markers. The surface levels of CD11b, leukocyte alkaline phosphatase (LAP), CD14, and tissue factor (TF) in PMNs from ET patients and healthy controls were evaluated in whole blood by flow cytometry. Results are reported as the percentage of PMNs positive for CD14, TF, or LAP, or as the mean fluorescence intensity (MFI) for CD11b. Results in the group of ET patients are reported according to JAK2 mutational status. Wt = wild-type; ET = overall ET group. ^∗p < 0.01 vs controls; ^∗∗p < 0.01.