No abstract available
MeSH terms
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Arthritis, Reactive / immunology*
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Black People*
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HLA Antigens / isolation & purification*
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Histocompatibility Antigens / isolation & purification*
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Humans
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Spondylitis, Ankylosing / immunology*
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United States / ethnology
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White People
Substances
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HLA Antigens
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Histocompatibility Antigens