Bariatric SurgeryObesity, MorbidLaparoscopyGeneral SurgeryGastric BypassCholecystectomy, LaparoscopicGastroplastyWeight LossPostoperative ComplicationsBiliopancreatic DiversionSurgery Department, HospitalSurgical Procedures, OperativeSpecialties, SurgicalTreatment OutcomeRetrospective StudiesInternship and ResidencyLength of StayProspective StudiesObesityEducation, Medical, GraduateJejunoileal BypassBariatric MedicinePostoperative CareAnastomosis, Roux-en-YAppendectomyLaparoscopesPreoperative CarePostoperative PeriodPreoperative PeriodFollow-Up StudiesHospitals, UniversityHospitals, TeachingIntraoperative ComplicationsHyperoxaluriaAvitaminosisTime FactorsSurgical Procedures, ElectiveGastrectomyBody Mass IndexRoboticsHernia, InguinalFellowships and ScholarshipsVascular Surgical ProceduresOperative TimeClinical CompetenceRisk FactorsCareer ChoiceGynecologic Surgical ProceduresBariatricsAmbulatory Surgical ProceduresReoperationHospitals, DistrictOperating RoomsPneumoperitoneum, ArtificialTraumatologyHospital DepartmentsFundoplication