Biliary Tract Surgical ProceduresBiliary Tract NeoplasmsBiliary Tract DiseasesBiliary TractGallbladder NeoplasmsSurgical Procedures, OperativeCholangiocarcinomaGallstonesBile Duct NeoplasmsCholelithiasisBile Ducts, ExtrahepaticCholecystectomyBile Ducts, IntrahepaticCholangitisGallbladderAmpulla of VaterBile DuctsPostoperative ComplicationsTreatment OutcomeCommon Bile DuctCholedochostomyBileCholecystitisCholestasisRetrospective StudiesCholangiopancreatography, Endoscopic RetrogradeCholangiographyBiliary FistulaSurgical Procedures, MinorBile Duct DiseasesDrainage