No abstract available
Publication types
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Letter
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Research Support, Non-U.S. Gov't
MeSH terms
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Adolescent
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Adult
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Aged
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Arthritis, Rheumatoid / epidemiology*
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Case-Control Studies
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Female
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Humans
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Incidence
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Male
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Middle Aged
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Selection Bias
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Sex Factors
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Socioeconomic Factors
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Sweden / epidemiology