No abstract available
MeSH terms
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Amyotrophic Lateral Sclerosis / epidemiology*
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Cohort Studies
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Confounding Factors, Epidemiologic
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Epidemiologic Research Design
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Humans
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Military Personnel / statistics & numerical data*
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Occupational Diseases / epidemiology*
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Occupational Exposure / statistics & numerical data*
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Prospective Studies
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Risk Factors