No abstract available
MeSH terms
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Electric Countershock / instrumentation*
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Emergency Medical Services
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Emergency Treatment*
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Health Services Accessibility*
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Heart Arrest / epidemiology
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Heart Arrest / therapy*
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Humans
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Incidence
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Survival Rate
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United States / epidemiology
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Ventricular Fibrillation / mortality
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Ventricular Fibrillation / therapy
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Volunteers