No abstract available
MeSH terms
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Adult
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Aged
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Alleles
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Arthritis, Rheumatoid / epidemiology
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Arthritis, Rheumatoid / genetics*
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Arthritis, Rheumatoid / immunology
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Chronic Disease
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Female
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Gene Frequency
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HLA-DR Antigens / genetics*
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HLA-DRB1 Chains
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Histocompatibility Testing
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Humans
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Male
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Middle Aged
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Prognosis
Substances
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HLA-DR Antigens
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HLA-DRB1 Chains