Chromosome MappingGenetic LinkagePedigreeLod ScoreGenetic MarkersGenes, RecessiveRecombination, GeneticHaplotypesConfidence IntervalsRisk FactorsTime FactorsProspective StudiesBirth IntervalsOdds RatioCohort StudiesCase-Control StudiesFollow-Up StudiesTreatment OutcomeProtein TransportRetrospective StudiesLogistic ModelsElectrocardiographyProportional Hazards ModelsMultivariate AnalysisRisk AssessmentPregnancyRiskAge FactorsUnited StatesPrevalencePrognosisLong QT SyndromeHeart RateInfant, NewbornPredictive Value of TestsGenotypeSurvival AnalysisCross-Sectional StudiesRegression AnalysisReproducibility of ResultsQuestionnairesDouble-Blind MethodSex FactorsSensitivity and SpecificityGenetic Predisposition to DiseaseSmokingSurvival RateLongitudinal StudiesReference ValuesAnalysis of VarianceBreast NeoplasmsX-Ray DiffractionRandomized Controlled Trials as TopicDrug Administration ScheduleRecurrenceSeverity of Illness IndexKaplan-Meier EstimateChi-Square DistributionPolymorphism, GeneticHeart Conduction SystemPolymorphism, Single NucleotideAge DistributionLinear ModelsEuropean Continental Ancestry GroupDose-Response Relationship, DrugMyocardial InfarctionConfounding Factors (Epidemiology)Cross-Over StudiesDisease ProgressionDenmarkBlood PressureTime PerceptionBody Mass IndexJapanSwedenBiological MarkersHospitalization