Laboratory workup showed normochromic normocytic non-regenerative anemia (hemoglobin = 6.7 g/dL), hepatic cytolysis (aspartate aminotransferase = 3× normal), cholestasis (alkaline phosphatase = 188 IU/L, gamma-glutamyl transferase = 335 IU/L), and a prothrombin time reduced to 54%. This evidence concerns the gene F2 and anemia.