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Myocardial Infarction
Electrocardiography
Myocardial Ischemia
Coronary Disease
Acute Disease
Angina, Unstable
Emergency Service, Hospital
Emergency Medical Services
Triage
Thrombolytic Therapy
Patient Admission
United States
New England
Coronary Care Units
Logistic Models
Prospective Studies
Predictive Value of Tests
Treatment Outcome
Time Factors
Risk Factors
Co-Publications
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20
19
13
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