Distribution and morphology of BrdU-labeled cells after global ischemia. BrdU was given twice daily 9–12 d after ischemia. Animals were then killed 15 (A,F), 26 (B, G), 40 (C, H), or 96 (D,I) d after ischemia. The sham-operated gerbil was killed 40 d (E, J) after surgery. F–J, High-magnification view. Scale bars (inE and F): A–E, 250 μm; F–J, 25 μm.