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ChiropracticManipulation, ChiropracticOutcome Assessment (Health Care)Manipulation, SpinalTreatment OutcomeMedicare Part BHealth StatusComplementary TherapiesPublic HealthLow Back PainBack PainDelivery of Health CareInflation, EconomicHealth Care SurveysQuality of LifeSmall-Area AnalysisPatient SatisfactionResearch DesignUnited StatesInjections, EpiduralPatient Acceptance of Health CareFollow-Up StudiesSports MedicineDisability EvaluationRetrospective StudiesQuestionnairesInsurance Claim ReportingOutcome and Process Assessment (Health Care)Physical Therapy ModalitiesHealth PolicyHealth SurveysAttitude to HealthHealth PromotionChronic DiseaseHealth ServicesMental HealthHealth Services AccessibilityReproducibility of ResultsProspective StudiesHealth Care ReformPain MeasurementEmpirical ResearchTime FactorsActivities of Daily LivingHealthOsteopathic PhysiciansHealth ExpendituresRandomized Controlled Trials as TopicSeverity of Illness IndexRisk AssessmentFluoroscopyPrimary Health CareQuality of Health CareManipulation, OrthopedicStudents, Health OccupationsPatient Outcome AssessmentHealth PlanningHealth BehaviorCross-Sectional StudiesClinical ProtocolsRecovery of FunctionHealth Status DisparitiesSingle-Blind MethodProgram EvaluationHealth PersonnelInsurance, HealthWorld HealthSpinal StenosisHealth Services for the AgedNeck PainHealth Services ResearchHealth Services Needs and DemandMassageCohort StudiesHealth EducationEducational MeasurementOral HealthHealth Knowledge, Attitudes, PracticeClinical Trials as TopicEpisode of CarePregnancy OutcomePilot ProjectsHealth Status IndicatorsSocioeconomic FactorsLumbosacral RegionPublic Health AdministrationEnvironmental HealthStrokeCurriculumMarketing of Health ServicesRange of Motion, ArticularOccupational HealthCost-Benefit AnalysisPredictive Value of TestsEducation, DentalEvidence-Based MedicineOutpatient Clinics, HospitalLongitudinal StudiesHealth Care CostsDouble-Blind Method