Figure 1From: Arsenic trioxide improves hematopoiesis in refractory severe aplastic anemiaHematopoietic recovery in five patients with refractory aplastic anemia after arsenic trioxide therapy. Bone marrow biopsy specimens were obtained from the five patients. Specimens from pre- and post-treatment (at 8 weeks) were shown. (Hematoxylin and eosin stain; Original magnification: × 100).Back to article page