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Photographs of immunohistochemical staining. (a, b) CD4+ T cells in TCR-α–/– mice treated with low dose FU plus UVBL (a; × 100, b; × 200). (c, d) CD8+T cells in TCR-α–/–mice treated with low dose FU plus UVBL (c; × 100, d; × 200). (e) CD4+T cells in control TCR-α–/– mice ( × 100).
