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United States
Voluntary Workers
Smoking
Walking
Cardiopulmonary Resuscitation
Electric Countershock
Spirometry
Defibrillators
Defibrillators, Implantable
Heart Arrest
Pulmonary Disease, Chronic Obstructive
Cardiovascular Diseases
Risk Factors
Prospective Studies
Cohort Studies
Logistic Models
Multicenter Studies
Emergency Medical Services
Frail Elderly
Brachial Artery
Co-Publications
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