A 40-year-old man comes to the physician for a routine health maintenance examination. He has history of hypertension managed with hydrochlorothiazide. Vitals are normal. A blood smear is shown. Which of the following is most likely to be seen in this patient?
Decreased erythrocyte cell membrane integrity
Decreased iron-binding capacity
Decreased synthesis of alpha-chains
Increased red cell distribution width
Normal serum ferritin