Bile Ducts, ExtrahepaticBile Duct NeoplasmsBile DuctsCholestasis, ExtrahepaticHepatic Duct, CommonCommon Bile DuctBile Ducts, IntrahepaticBiliary Tract NeoplasmsAdenoma, Bile DuctBile Duct DiseasesBiliary TractKlatskin's TumorBileBiliary AtresiaBiliary Tract Surgical ProceduresGallstonesCommon Bile Duct NeoplasmsCholangiographyJaundice, ObstructiveCholestasisBile Acids and SaltsGallbladder NeoplasmsCholangitisCholangiopancreatography, Endoscopic RetrogradeCholangiocarcinomaCholedochal CystGallbladderJaundiceCholecystectomyBiliary Tract DiseasesAmpulla of VaterCholangitis, SclerosingSphincterotomy, EndoscopicCholedochostomyDrainageEndosonographyJejunostomyAnastomosis, Roux-en-YKeratin-7Common Bile Duct DiseasesHepatectomyLiverHepatic ArteryPancreatic DuctsImmunohistochemistryTomography, X-Ray ComputedAdenocarcinomaSpectroscopy, Near-InfraredCystic DuctTreatment OutcomeCholelithiasis