title: Cholangiocarcinoma.
authors.affiliation: Medical School Hannover, Department of Gastroenterology, Hepatology and Endocrinology, Carl-Neubergstr. 1, Hannover, Germany. Electronic address: vogel.arndt@mh-hannover.de.
authors.forename: Arndt
authors.initials: A
authors.lastname: Vogel
authors.affiliation: Medical School Hannover, Department of Gastroenterology, Hepatology and Endocrinology, Carl-Neubergstr. 1, Hannover, Germany. Electronic address: manns.michael@mh-hannover.de.
authors.forename: Michael P
authors.initials: MP
authors.lastname: Manns