Intestinal ObstructionPlasticsMetalsDuodenal ObstructionStentsJejunal DiseasesGastric Outlet ObstructionPalliative CareForeign-Body MigrationCholestasis, ExtrahepaticJaundice, ObstructiveEsophageal DiseasesDeglutition DisordersEsophageal StenosisColonic DiseasesEndoscopyBronchoscopyCholangiopancreatography, Endoscopic RetrogradeEndoscopy, GastrointestinalCholestasisCoated Materials, BiocompatibleProsthesis DesignConstriction, PathologicDevice RemovalDrainageEquipment DesignBile Duct NeoplasmsTreatment OutcomeRetrospective StudiesEsophageal NeoplasmsReproducibility of ResultsColorectal NeoplasmsTime Factors