No abstract available
Publication types
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Letter
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Research Support, N.I.H., Extramural
MeSH terms
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Follow-Up Studies
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Humans
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Incidence
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Insurance Coverage
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Macular Degeneration / epidemiology*
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Medicare / statistics & numerical data*
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Proportional Hazards Models
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Retrospective Studies
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United States / epidemiology
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Vitamin D Deficiency / epidemiology*