1. Reprints: Christoph Röcken, MD, PhD, Institute of Pathology, Otto-von-Guericke-University, Leipziger Str 44, D-39120 Magdeburg, Germany.
2. From the Institute of Pathology (Drs Röcken and Roessner), Department of Surgery (Drs Pross and Ridwelski), and Department of Gastroenterology, Hepatology and Infectious Diseases (Dr Brucks), Otto-von-Guericke-University, Magdeburg, Germany.