GastrectomyStomach NeoplasmsPostgastrectomy SyndromesAnastomosis, Roux-en-YGastroenterostomyGastric StumpEsophagostomyLaparoscopyDuodenostomyLymph Node ExcisionStomachDumping SyndromeObesity, MorbidStomach DiseasesJejunostomySerous MembranePostoperative ComplicationsJejunumVagotomyGastroscopyStomach UlcerBariatric SurgeryAdenocarcinomaPylorusAnastomosis, SurgicalEsophagusTreatment OutcomeGastric BypassDuodenumZollinger-Ellison SyndromeGastroplastyVagotomy, TruncalAnastomotic LeakDuodenogastric RefluxPeptic UlcerMelenaCarcinoma, Signet Ring CellDuodenal UlcerRetrospective StudiesReconstructive Surgical ProceduresSurgical EquipmentWeight LossJejunal DiseasesGastric MucosaDuodenoscopesLymphatic MetastasisSurgical StaplingGastric EmptyingCobalt IsotopesSplenectomyPacific StatesAlcoholicsSurgically-Created StructuresNeoplasm StagingSurgical StaplersPyloric Antrum