Risk AssessmentHealth Impact AssessmentCarcinogensOccupational ExposureRisk FactorsRisk ManagementSafety ManagementRiskProportional Hazards ModelsRetrospective StudiesAge FactorsModels, StatisticalEnvironmental ExposureEnvironmental PollutantsFollow-Up StudiesIncidenceCause of DeathSurvival AnalysisPrognosisTreatment OutcomeTime FactorsUnited StatesCohort StudiesLogistic ModelsProspective Studies