A 66-year-old man has been diagnosed with sideroblastic anemia. The inclusions indicated by the arrows in the image were seen in many of the RBCs on his Wright-stained peripheral blood smear. What is the identity of these inclusions?

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A 66-year-old man has been diagnosed with sideroblastic anemia. The inclusions indicated by the arrows in the image were seen in many of the RBCs on his Wright-stained peripheral blood smear. What is the identity of these inclusions?

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