Histologic features of liver in leukemic mice that received transplants in intermittent hypoxia. In the same experiments as those described in Figure 2, histopathologic sections were stained with H&E for liver (A, original magnification × 10/0.30 NA PH1 objective lens; B, original magnification × 100/1.30 NA oil objective lens). Arrowheads indicate mature myeloid cells with ring- (black) or horseshoe-shaped (blue) nuclei. Symbols i to v represent mice with the same treatment as in Figure 2.