https://www.justfacts.com/healthcare.asp

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https://www.kff.org/uninsured/report/uncompensated-care-for-the-uninsured-in-2013-a-detailed-examination/

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https://en.wikipedia.org/wiki/Health_insurance_coverage_in_the_United_States

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https://www.cdc.gov/nchs/fastats/health-insurance.htm

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