LaparoscopesActuarial AnalysisForecastingEconomic CompetitionPrognosisHealth Care SectorNeoplasmsUnited StatesCommerceTreatment OutcomeMarketingFollow-Up StudiesInfant, NewbornMarketing of Health ServicesInvestmentsSurvival AnalysisTime FactorsAge FactorsAntineoplastic AgentsSurvival RateQuestionnairesRetrospective Studies