Affiliation: | 1. Innere Abteilung Ev, Krankenhaus Kalk, University of Cologne, , K?ln, Germany;2. Private Gastroenterology Practice, , Amberg, Germany;3. Private Gastroenterology Practice, , Wolmirstedt, Germany;4. Private Gastroenterology Practice, , Mannheim, Germany;5. Clinical Research & Development Department, Dr. Falk Pharma GmbH, , Freiburg, Germany |