Department of General;
Visceral and Transplantation Surgery;
University Hospital Aachen;
Department of Gastroenterology and Hepatology;
University Hospital Aachen;
Liver; transplantation; Biliary; complications; Anastomotic; stenosis; Ischemic; type; biliary; lesion; Nonanastomotic; strictures; Bile; leak; Ischemic; time; Biliary; drain; complications;