Gastric BypassBiliopancreatic DiversionObesity, MorbidDuodenumDuodenogastric RefluxWeight LossAnastomosis, Roux-en-YGastroplastyBariatric SurgeryLaparoscopyPostoperative ComplicationsGlucagon-Like Peptide 1ObesityJejunostomyPostoperative PeriodSurgical StaplersPeptide YYSteatorrheaGastric FistulaJejunumHyperoxaluriaStomachIncretinsTreatment OutcomeGenes, SwitchBody Mass IndexGastrostomyFollow-Up StudiesPostoperative CareAvitaminosisGastric Inhibitory PolypeptideFood PreferencesDiabetes Mellitus, Type 2Coronary Artery Bypass, Off-PumpProspective StudiesTime FactorsAppetite RegulationReoperationHerniaPostprandial PeriodSurgical StaplingOmentumJejunal DiseasesPreoperative PeriodAnastomosis, SurgicalBlood GlucoseConstriction, PathologicGhrelinMalabsorption SyndromesNesidioblastosisAnastomotic LeakImmunoglobulin Switch RegionCandyNephrolithiasisSatiety ResponseJejunoileal BypassRetrospective StudiesGastrointestinal HormonesGastrectomyHernia, Abdominal