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Time course of degeneration of VR, DR and DF in hSOD1-G93A mice. Tissues were obtained from hSOD1-G93A mice at indicated ages and from their non-transgenic littermates at 120 days of age and stained with toluidine blue. The data are representative of all animals examined, at least 3 animals in each group at each time point. A-I: 400×.
