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Developing CountriesDeveloped CountriesEuropeWorld HealthWorld Health OrganizationPrevalenceInternational CooperationInternationalityRisk FactorsTreatment OutcomeAsiaAfricaRetrospective StudiesCross-Cultural ComparisonSensitivity and SpecificityReproducibility of ResultsIncidenceQuestionnairesUnited StatesLatin AmericaProspective StudiesCross-Sectional StudiesInfant, NewbornTime FactorsEuropean UnionMiddle EastIndiaEurope, EasternHealth PolicySeverity of Illness IndexAge FactorsAfrica South of the SaharaSocioeconomic FactorsUnited NationsPopulation SurveillanceFollow-Up StudiesPregnancyPredictive Value of TestsCohort StudiesBrazilAustraliaPatient SelectionScandinaviaEmigration and ImmigrationDelivery of Health CareCanadaGreat BritainPractice Guidelines as TopicRisk AssessmentData CollectionSex FactorsAsia, SoutheasternRandomized Controlled Trials as TopicAge DistributionHealth SurveysTravelDisease OutbreaksGuidelines as TopicSpainPakistanJapanEvidence-Based MedicineAmericasInternational AgenciesFranceHIV InfectionsSouth AmericaIncomeHealth Services AccessibilityPacific IslandsPublic HealthDiagnostic and Statistical Manual of Mental DisordersSex DistributionPrognosisChinaGermanyHealth PrioritiesResearch DesignLogistic ModelsQuality ControlRural PopulationCost-Benefit AnalysisItalyMexicoRegistriesPovertyAfrica, NorthernMass ScreeningEconomicsThailandNational Health ProgramsAlgorithmsCommunicable Disease ControlGeographyDatabases, FactualNew ZealandTerminology as TopicImmunization ProgramsCaribbean RegionCost of Illness