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    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 2001 Dec 01. 98(25), 14577-14582.

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    Academic Journal

    Source: Proceedings of the National Academy of Sciences of the United States of America, 1980 Feb 01. 77(2), 1116-1119.

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    Academic Journal

    Source: New England Journal of Medicine; February 14 1985, Vol. 312, p395-399, 5p

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    Academic Journal

    Source: Annual Review of Immunology; 1995, Vol. 13, p277-305, 29p

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    Academic Journal
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