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Figure 1: (a) Bone marrow aspiration findings (original magnification, ×400). The ratio of red cell precursors was significantly low. No cellular deformation or increase of blast count was found. (b) Bone marrow biopsy of this patient on hospital day 21. There is significant reduction of red cell precursors (H and E, ×200)

Figure 1: (a) Bone marrow aspiration findings (original magnification, ×400). The ratio of red cell precursors was significantly low. No cellular deformation or increase of blast count was found. (b) Bone marrow biopsy of this patient on hospital day 21. There is significant reduction of red cell precursors (H and E, ×200)