Reference ValuesHealthEnzyme-Linked Immunosorbent AssayCase-Control StudiesSex FactorsAge FactorsRisk FactorsSensitivity and SpecificityImmunoglobulin GAgingBiological MarkersFecesTime FactorsLymphocytesUnited StatesAntibodies, ViralAnalysis of VariancePrevalenceImmunoglobulin MAutoantibodiesChronic DiseaseLinear ModelsPolymerase Chain ReactionReproducibility of ResultsAntibodies, BacterialDisabled PersonsProspective StudiesBlood GlucoseGenotypePolymorphism, GeneticQuestionnairesMolecular Sequence DataCross-Sectional StudiesAttitude to HealthHomeless PersonsHealth Knowledge, Attitudes, PracticeGreat BritainInterviews as TopicHIV InfectionsAttitude of Health PersonnelQualitative ResearchMentally Ill PersonsSocioeconomic FactorsMentally Disabled PersonsVisually Impaired PersonsQuality of LifePhysician-Patient RelationsIncidenceAttitudePatient Acceptance of Health CareCohort StudiesHealth StatusGeriatric AssessmentEnglandFocus GroupsSelf ConceptHealth SurveysData CollectionHealth Services for the AgedStereotypingPatient SatisfactionWeight PerceptionAge DistributionHealth Services AccessibilitySocial SupportRural PopulationPrejudiceCaregiversDementiaPopulation SurveillanceLongitudinal StudiesHealthy People ProgramsAccidental FallsMental DisordersFollow-Up StudiesAttitude to DeathNetherlandsDecision MakingPerceptionCommunicationResidence CharacteristicsFrail ElderlyPublic OpinionAustraliaEmotionsFamily PracticeLogistic ModelsSex DistributionCultureDepressionMass ScreeningRisk AssessmentStress, PsychologicalAdaptation, PsychologicalTreatment OutcomeDisease OutbreaksUrban PopulationPatient Education as TopicSocial PerceptionHealth Care Surveys