Biliary Tract Surgical ProceduresBiliary Tract NeoplasmsBiliary Tract DiseasesBiliary TractGallbladder NeoplasmsSurgical Procedures, OperativeCholangiocarcinomaGallstonesBile Duct NeoplasmsCholelithiasisBile Ducts, ExtrahepaticCholecystectomyBile Ducts, IntrahepaticCholangitisGallbladderMotor SkillsAmpulla of VaterBile DuctsTreatment OutcomePostoperative ComplicationsCommon Bile DuctCholedochostomyBileCholecystitisRetrospective StudiesCholestasisCholangiopancreatography, Endoscopic RetrogradeCholangiographyBiliary FistulaSurgical Procedures, MinorBile Duct DiseasesTime FactorsDrainage