8-25 The specificity and/or the strength of signals for negative and positive selection must differ.
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8-26 Self-recognizing regulatory T cells and innate T cells develop in the thymus.
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8-27 The final stage of T-cell maturation occurs in the thymic medulla.
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8-28 T cells that encounter sufficient quantities of self antigens for the first time in the periphery are eliminated or inactivated.
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