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    Principles of Epidemiology
    • Basic Principles of Epidemiology
      • Epidemiological Terms and Concepts
      • Descriptive Epidemiology
      • Analytical Epidemiology
      • Observational Studies
        • Ecological Studies
        • Cohort Studies
        • Case-Control Studies
      • Interventional Studies
        • Randomized Controlled (Clinical) Trials
        • Nonrandomized (Community) Trials
      • Bias
        • References
      • Errors
        • References
      • Variable Associations and Causality
      • Sensitivity and Specificity
      • Disease Outbreak Investigation
        • For More Information
    • Public Health Prevention Strategies
    • Survival Analysis
      • Survival (Time-to-Event) Data
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