Bariatric SurgeryObesity, MorbidLaparoscopyGeneral SurgeryGastric BypassGastroplastyCholecystectomy, LaparoscopicWeight LossBiliopancreatic DiversionPostoperative ComplicationsSpecialties, SurgicalTreatment OutcomeSurgical Procedures, OperativeSurgery Department, HospitalBariatric MedicineObesityJejunoileal BypassAnastomosis, Roux-en-YRetrospective StudiesPreoperative PeriodPostoperative CareHyperoxaluriaAvitaminosisInternship and ResidencyProspective StudiesPostoperative PeriodEducation, Medical, GraduatePreoperative CareGastrectomyBody Mass IndexLaparoscopesAppendectomyFollow-Up StudiesLength of StayIntraoperative ComplicationsBariatricsSurgical Procedures, ElectiveTime FactorsRoboticsOperative TimeHernia, InguinalVascular Surgical ProceduresClinical CompetenceFellowships and ScholarshipsReoperationOrthopedicsInformed Consent By MinorsGastric Fistula