NephrectomyLaparoscopyHand-Assisted LaparoscopyKidney NeoplasmsCarcinoma, Renal CellPyelonephritis, XanthogranulomatousUmbilicusRetroperitoneal SpaceLearning CurveConversion to Open SurgeryHospitals, CountyHemostasis, SurgicalPolycystic Kidney DiseasesCholecystectomy, LaparoscopicTreatment OutcomeRetrospective StudiesUrologyBlood Loss, SurgicalLiving DonorsPostoperative ComplicationsFree RadicalsRenal ArteryAngiomyolipomaRenal VeinsLength of StayRoboticsVena Cava, InferiorTime FactorsTomography, X-Ray ComputedKidneySurgical Procedures, Minimally InvasiveNeoplasm StagingLaparoscopesTissue and Organ HarvestingWarm IschemiaKidney TransplantationFollow-Up StudiesHydroxyl RadicalOperative TimeUreterPrognosisPneumoperitoneum, ArtificialIntraoperative Complications