No abstract available
MeSH terms
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Adult
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Aged
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Arthritis, Rheumatoid / diagnosis
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Arthritis, Rheumatoid / genetics*
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HLA Antigens / analysis*
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HLA-B27 Antigen
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HLA-DR4 Antigen
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Histocompatibility Antigens Class II / analysis*
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Humans
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Middle Aged
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Spondylitis, Ankylosing / diagnosis
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Spondylitis, Ankylosing / genetics*
Substances
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HLA Antigens
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HLA-B27 Antigen
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HLA-DR4 Antigen
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Histocompatibility Antigens Class II