Parkinson DiseaseHealth Care CostsCosts and Cost AnalysisDrug CostsCost of Illnessalpha-SynucleinAntiparkinson AgentsParkinsonian DisordersCost ControlParkinson Disease, SecondaryLevodopaDirect Service CostsGlucosylceramidaseCost SharingCost-Benefit AnalysisSubstantia NigraLewy BodiesCost AllocationDeep Brain StimulationMultiple System AtrophyDopamine1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridineDopaminergic NeuronsOxidopamineSubthalamic NucleusLewy Body DiseaseNeurodegenerative DiseasesGait Disorders, NeurologicMPTP PoisoningSupranuclear Palsy, ProgressivePostural BalanceDance TherapyPutamenEssential TremorUbiquitin-Protein LigasesModels, EconomicGaitNeuronsBrainPedunculopontine Tegmental NucleusREM Sleep Behavior DisorderGaucher DiseaseOncogene ProteinsTyrosine 3-MonooxygenasePergolideCarbidopaEmployer Health CostsDementiaUnited StatesNerve DegenerationHypokinesiaQuality-Adjusted Life Yearsbeta-SynucleinCorpus StriatumSeverity of Illness IndexMutationMovement DisordersGlobus PallidusMesencephalonGenetic Predisposition to DiseaseAge of OnsetManebNeuroprotective AgentsMitochondriaCase-Control StudiesDyskinesiasNeuropsychological Tests1-Methyl-4-phenylpyridiniumOlfaction DisordersSynucleinsTropanesTime FactorsDisease Models, AnimalDopamine Plasma Membrane Transport ProteinsTreatment OutcomeDopamine AgentsGenetic TestingRetrospective StudiesPositron-Emission TomographyAlzheimer DiseaseDopamine AgonistsApathyCohort StudiesBenzothiazolesHealth ResourcesSleep Arousal DisordersReproducibility of ResultsAutophagytau ProteinsPrimary DysautonomiasRotenoneCognition DisordersAdrenergic AgentsPostmortem ChangesSensitivity and SpecificityGenome-Wide Association StudyProspective StudiesBasal GangliaModels, BiologicalManganese Poisoning