DigoxinMortalitySepsisRisk FactorsProportional Hazards ModelsCohort StudiesRetrospective StudiesTreatment OutcomeTime FactorsSurvival RateSurvival AnalysisProspective StudiesRisk AssessmentHospital MortalityMyocardial InfarctionDisease Models, AnimalInfant MortalityMice, KnockoutDigitoxinMice, Inbred C57BLCardenolidesCardiotonic AgentsCause of DeathCardiac GlycosidesChild MortalityMedigoxinMaternal MortalityEleutherococcusFollow-Up StudiesHeart FailureAnti-Arrhythmia AgentsDigitalis GlycosidesInfant, NewbornDrug InteractionsNeriumUnited StatesAge FactorsCardiovascular DiseasesMortality, PrematureOuabainRadioimmunoassayPrognosisPerinatal MortalityP-GlycoproteinIncidence