In contrast to PV patients, the levels and antibody positivity of anti-TPO antibody in PF patients were likely to be higher in males (56.57 ± 32.13 IU/ml, 21.4%) than females (7.01 ± 4.63 IU/ml, 16.7%), although no statistical significance was reached (Figures 3B, C). The gene discussed is TPO; the disease is acquired polycythemia vera.