No abstract available
Publication types
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Research Support, U.S. Gov't, P.H.S.
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Review
MeSH terms
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Animals
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Antigen-Presenting Cells / physiology
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CD28 Antigens / physiology
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Humans
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Immune Tolerance*
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Receptors, Antigen, T-Cell / physiology
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T-Lymphocytes / immunology
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Thymus Gland / immunology*
Substances
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CD28 Antigens
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Receptors, Antigen, T-Cell