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MediumHaematologyIron Deficiency Anaemiaukmlamrcp part 1mrcgp akt

A 60-year-old man is found to have microcytic, hypochromic anaemia with Hb 92 g/L and ferritin 8 μg/L. He denies overt bleeding and is otherwise asymptomatic. What is the most appropriate next investigation?

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