No abstract available
MeSH terms
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Canada / epidemiology
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Cohort Studies*
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Humans
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Medical Record Linkage*
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Medical Records Systems, Computerized*
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Mining
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Mortality
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Neoplasms / epidemiology
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Neoplasms / etiology
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Occupational Diseases / epidemiology
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Probability
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Railroads
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Registries
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United States / epidemiology