Digestive System Surgical ProceduresDigestive System NeoplasmsDigestive System DiseasesDigestive SystemDigestive System and Oral Physiological PhenomenaDigestive System Physiological PhenomenaDigestive System ProcessesDigestive System FistulaGastrointestinal TractClemastineGastrointestinal NeoplasmsSurgical Procedures, OperativeDigestive System AbnormalitiesDiagnostic Techniques, Digestive SystemGastrointestinal DiseasesIntestinesPancreasStomachLarvaTime FactorsTissue DistributionSurgical Procedures, MinorPostoperative ComplicationsCause of DeathTreatment OutcomeStomach NeoplasmsRisk FactorsNeoplasmsRetrospective StudiesEndoscopy, Digestive SystemLiver NeoplasmsAmbulatory Surgical ProceduresMolecular Sequence DataChinaSurgical Procedures, Minimally InvasiveOral Surgical ProceduresVascular Surgical ProceduresAsian Continental Ancestry GroupCardiac Surgical ProceduresSurgical Procedures, ElectiveReconstructive Surgical ProceduresPhylogenyGynecologic Surgical ProceduresGenetic Predisposition to DiseaseOtorhinolaryngologic Surgical ProceduresUrologic Surgical ProceduresObstetric Surgical ProceduresOphthalmologic Surgical ProceduresPolymorphism, GeneticDigestionThoracic Surgical ProceduresFollow-Up StudiesNational Institute of Diabetes and Digestive and Kidney Diseases (U.S.)Cardiovascular Surgical ProceduresGeneral SurgeryPreoperative Care