Bile Ducts, ExtrahepaticBile DuctsBile Duct NeoplasmsBileCholestasis, ExtrahepaticCommon Bile DuctBile Ducts, IntrahepaticBile Duct DiseasesHepatic Duct, CommonAdenoma, Bile DuctBiliary Tract NeoplasmsBile Acids and SaltsBiliary TractGallstonesCommon Bile Duct NeoplasmsCholangiographyBiliary Tract Surgical ProceduresBiliary AtresiaKlatskin's TumorCholestasisJaundice, ObstructiveCholangiopancreatography, Endoscopic RetrogradeCholangitisCholangiocarcinomaGallbladder NeoplasmsGallbladderCholecystectomyCholedochal CystCommon Bile Duct DiseasesJaundiceBiliary Tract DiseasesAmpulla of VaterSphincterotomy, EndoscopicPancreatic DuctsCholangitis, SclerosingCholedochostomyDrainageLiverJejunostomyAnastomosis, Roux-en-YCystic DuctEndosonographyKeratin-7HepatectomyCholelithiasisHepatic ArteryCholecystectomy, LaparoscopicThoracic DuctLigationImmunohistochemistryTomography, X-Ray ComputedCholangiopancreatography, Magnetic ResonanceCholedocholithiasisTreatment OutcomeAdenocarcinomaCholestasis, IntrahepaticPortal VeinSpectroscopy, Near-InfraredSalivary DuctsLiver NeoplasmsRetrospective StudiesBile PigmentsBile Canaliculi