A 42-year-old man is feeling chronically fatigued. His hemoglobin is 11.5 g/dL, and the blood film is hypochromic and microcytic. The serum iron is increased, total iron-binding capacity (TIBC) is normal, ferritin is increased, and HbA2 is decreased.For the above patient with a hypochromic microcytic anemia, select the most likely diagnosis