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Great Britain
United States
Pennsylvania
Adverse Drug Reaction Reporting Systems
Cohort Studies
Factual Databases
Retrospective Studies
Computerized Medical Records Systems
Time Factors
Incidence
International Classification of Diseases
Risk Factors
Digoxin
Warfarin
Pharmacoepidemiology
Hospitalization
Epidemiologic Research Designs
Epidemiologic Methods
Drug Toxicity
Physician's Practice Patterns
Co-Publications
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