Our study found significant differences between the GH and EH groups regarding the rates of leukopenia (4.5% vs. 10.6%), anaemia (15.7 vs. 26.5%), and thrombocytopenia (6.2% vs. 13.6%) and prolonged prothrombin time (0.4% vs. 4.5%). This evidence concerns the gene F2 and anemia (phenotype).