Models, EconomicCost-Benefit AnalysisQuality-Adjusted Life YearsModels, EconometricTechnology Assessment, BiomedicalEconomics, PharmaceuticalGreat BritainHealth Care CostsRandomized Controlled Trials as TopicDrug CostsCost SavingsDecision Support TechniquesCosts and Cost AnalysisMarkov ChainsTreatment OutcomeQuality of LifeUnited States