Gastric BypassObesity, MorbidBody Mass IndexAnastomosis, Roux-en-YGastroplastyWeight LossBariatric SurgeryObesityLaparoscopyBiliopancreatic DiversionPostoperative ComplicationsGlucagon-Like Peptide 1Postoperative PeriodPeptide YYJejunostomySurgical StaplersSteatorrheaGastric FistulaJejunumTreatment OutcomeHyperoxaluriaStomachFollow-Up StudiesProspective StudiesIncretinsBody WeightMass SpectrometryDiabetes Mellitus, Type 2Risk FactorsGastrostomyTime FactorsBlood GlucosePostoperative CareFood PreferencesGastric Inhibitory PolypeptideAvitaminosisBody CompositionPostprandial PeriodAppetite RegulationCoronary Artery Bypass, Off-PumpRetrospective StudiesReoperationGhrelinHerniaOmentumPreoperative PeriodSurgical StaplingJejunal DiseasesAnastomosis, SurgicalConstriction, PathologicInsulin ResistanceMalabsorption SyndromesSatiety ResponseAnastomotic LeakNesidioblastosisCaloric RestrictionCandyEatingEnergy MetabolismNephrolithiasisGastrectomyComorbidityHernia, AbdominalGastrointestinal HormonesJejunoileal BypassFeeding BehaviorCohort StudiesLength of StayInsulinEnergy IntakeVascular PatencyGastroenterostomyCalcium CitrateCross-Sectional StudiesSaphenous VeinUtahPleasureDiet, ReducingOverweightAdiposityWeight GainLeptinDuodenumAppetiteDumping Syndrome