Reference ValuesHealthEnzyme-Linked Immunosorbent AssayCase-Control StudiesSex FactorsRisk FactorsAge FactorsTime FactorsSensitivity and SpecificityAgingImmunoglobulin GBiological MarkersPrevalenceFecesUnited StatesLymphocytesAnalysis of VarianceChronic DiseaseQuestionnairesAntibodies, ViralProspective StudiesLinear ModelsImmunoglobulin MAutoantibodiesReproducibility of ResultsPolymerase Chain ReactionAntibodies, BacterialDisabled PersonsDepressionBlood GlucoseGenotypeCross-Sectional StudiesPolymorphism, GeneticQuality of LifeSeverity of Illness IndexSymptom AssessmentMolecular Sequence DataTreatment OutcomePsychiatric Status Rating ScalesFollow-Up StudiesAttitude to HealthLongitudinal StudiesInterviews as TopicCohort StudiesGreat BritainSocioeconomic FactorsHealth Knowledge, Attitudes, PracticeHealth StatusStress, PsychologicalHomeless PersonsAnxietyIncidenceHIV InfectionsDepressive DisorderHealth SurveysPatient Acceptance of Health CareBehavioral SymptomsQualitative ResearchRetrospective StudiesAttitude of Health PersonnelPainPsychometricsAdaptation, PsychologicalMental DisordersLogistic ModelsSelf ConceptPhysician-Patient RelationsSocial SupportEnglandSchizophreniaComorbidityCaregiversGeriatric AssessmentAge DistributionFatigueMentally Ill PersonsAffective SymptomsNetherlandsData CollectionVisually Impaired PersonsMentally Disabled PersonsDementiaRegression AnalysisPilot ProjectsAttitudeRisk AssessmentEmotionsActivities of Daily LivingSchizophrenic PsychologyPerceptionSex DistributionFocus GroupsRural PopulationPsychotic DisordersCognition DisordersFamily PracticeSmokingPopulation SurveillanceStress Disorders, Post-TraumaticStereotyping