HospitalizationPneumoniaPneumonia, BacterialPneumonia, ViralPneumonia, PneumococcalCryptogenic Organizing PneumoniaPneumonia, PneumocystisPneumonia, StaphylococcalPneumonia, Ventilator-AssociatedPneumonia, AspirationCommunity-Acquired InfectionsPneumonia, MycoplasmaLength of StayRetrospective StudiesPneumonia, LipidRisk FactorsUnited StatesProspective StudiesTreatment OutcomeLung Diseases, InterstitialIncidenceCohort StudiesAnti-Bacterial AgentsChild, HospitalizedPatient DischargeInfant, NewbornPatient ReadmissionLungTime FactorsSeverity of Illness IndexInfluenza, HumanHeart FailureHospital CostsCross InfectionFollow-Up StudiesPatient AdmissionIdiopathic Interstitial PneumoniasStreptococcus pneumoniaeHealth Care CostsHospital MortalityComorbidityAmbulatory CareAge FactorsAcute DiseaseInpatientsIntensive Care UnitsMurine pneumonia virusAge DistributionPneumocystis jiroveciiSeasonsRisk AssessmentEmergency Service, HospitalPneumocystisRespiratory Tract InfectionsMycoplasma pneumoniaeRadiography, ThoracicLegionnaires' DiseaseBronchoalveolar Lavage FluidLogistic ModelsBronchiolitisRespiration, ArtificialMedicareRespiratory Syncytial Virus InfectionsTrimethoprim-Sulfamethoxazole CombinationEmpyemaHospital ChargesMultivariate AnalysisPrognosisPneumococcal VaccinesBronchopneumoniaCost of IllnessDatabases, FactualProportional Hazards ModelsDenmarkPopulation SurveillancePulmonary EosinophiliaBacteremiaHospitals, PsychiatricInfluenza A Virus, H1N1 SubtypeBrazilPulmonary Disease, Chronic ObstructiveGastroenteritisFatal OutcomeVentilators, MechanicalSex DistributionChronic DiseasePrevalenceHospitalsPneumonia, Progressive Interstitial, of SheepPoisson DistributionCosts and Cost AnalysisRotavirus InfectionsPredictive Value of TestsSurvival AnalysisCost-Benefit AnalysisInsurance, HospitalizationNursing HomesInternational Classification of DiseasesBronchoalveolar LavagePseudomonas Infections