No abstract available
MeSH terms
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Delivery of Health Care / history*
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Delivery of Health Care / trends
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Health Benefit Plans, Employee / history
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Health Benefit Plans, Employee / trends
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History, 20th Century
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Insurance Coverage / history
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Insurance Coverage / trends
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Medicaid / history
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Medicaid / trends
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Medicare / history*
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Medicare / trends
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Program Evaluation
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Social Change
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United States