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United States
Massachusetts
Retrospective Studies
Drug Utilization
Age Factors
Logistic Models
Cohort Studies
Odds Ratio
Drug Prescriptions
Risk Factors
Medication Errors
Confidence Intervals
Treatment Outcome
Myocardial Infarction
Nursing Homes
Homes for the Aged
Health Maintenance Organizations
Physician's Practice Patterns
Pharmaceutical Preparations
Thrombolytic Therapy
Co-Publications
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