GastrectomyObesity, MorbidBariatric SurgeryGastroplastyLaparoscopyGastric BypassWeight LossTreatment OutcomeStomach NeoplasmsStomachGastrointestinal HormonesPostgastrectomy SyndromesPostoperative ComplicationsAnastomosis, Roux-en-YGhrelinGastroenterostomyRats, Long-EvansGlucagon-Like Peptide 1ObesityBody Mass IndexProspective StudiesGastric StumpBody WeightFollow-Up StudiesBlood GlucoseEsophagostomyLymph Node ExcisionDuodenostomyRetrospective StudiesDumping SyndromeJejunumStomach DiseasesAnastomosis, SurgicalPulmonary Surgical ProceduresJejunostomyPylorusDuodenumSerous MembranePulmonary VeinsEsophagusTime FactorsPostoperative PeriodVagotomyGastroscopyAdenocarcinomaStomach Ulcer