PneumoniaPneumonia, BacterialPneumonia, ViralPneumonia, PneumococcalPostoperative ComplicationsCryptogenic Organizing PneumoniaPneumonia, PneumocystisPneumonia, StaphylococcalPneumonia, Ventilator-AssociatedPneumonia, AspirationCommunity-Acquired InfectionsPneumonia, MycoplasmaTreatment OutcomeRetrospective StudiesPneumonia, LipidIntraoperative ComplicationsLung Diseases, InterstitialProspective StudiesLungRisk FactorsAnti-Bacterial AgentsTime FactorsIdiopathic Interstitial PneumoniasFollow-Up StudiesDiabetes ComplicationsStreptococcus pneumoniaeLength of StayRadiography, ThoracicPneumocystis jiroveciiMurine pneumonia virusFatal OutcomeIncidenceTomography, X-Ray ComputedPneumocystisPregnancy ComplicationsBronchoalveolar Lavage FluidHospitalizationLegionnaires' DiseaseCross InfectionSeverity of Illness IndexMycoplasma pneumoniaeRespiration, ArtificialReoperationBronchopneumoniaIntensive Care UnitsAcute DiseaseTrimethoprim-Sulfamethoxazole CombinationPulmonary EosinophiliaInfant, NewbornLung DiseasesRisk AssessmentEmpyemaBronchoalveolar LavageCohort StudiesVentilators, MechanicalPneumonia, Progressive Interstitial, of SheepSurgical Wound InfectionBronchoscopyHemorrhageLaparoscopyObstetric Labor ComplicationsDrainageAnti-Infective AgentsPseudomonas InfectionsImmunocompromised HostInfluenza, HumanEquipment FailureBacteremiaHospital MortalityPneumococcal VaccinesPrognosisPneumonia of Swine, MycoplasmalAge FactorsDevice RemovalRespiratory InsufficiencyRecurrenceSepsisOpportunistic InfectionsPregnancyPneumocystis cariniiSurvival RateForeign-Body MigrationIntubation, IntratrachealAIDS-Related Opportunistic InfectionsRespiratory Tract InfectionsComorbidityChild, HospitalizedChi-Square DistributionSurgical Wound DehiscenceLegionella pneumophilaCatheters, IndwellingDeglutition DisordersIatrogenic DiseaseLogistic ModelsPneumococcal InfectionsPostoperative HemorrhageUnited StatesCatheterizationPostoperative CareAnastomosis, Surgical