Affiliation: | Sabine Heidecke, Dirk L Stippel, Arnulf H Hoelscher, Department of General-, Visceral- and Cancer Surgery, University Hospital of Cologne, Cologne 50937, Germany;Inga Wedemeyer, Hans-Peter Dienes, Uta Drebber, Department of Pathology, University Hospital of Cologne, Cologne 50937, Germany |