1. Department of Gastroenterology, Landeskrankenhaus‐Universitaetskliniken, Graz, Austria,
2. Gastroenterology Department, Hospital Central de Asturias, Oviedo, Spain,
3. Abbott Laboratories, Abbott Park, Illinois, USA,
4. Hospital Maisonneuve‐Rosemont, Montreal, Quebec, Canada,
5. 401 General Military Hospital, Athens, Greece,
6. General Hospital of Athens, Greece,
7. Division of Gastroenterology, University of Alberta, Edmonton, Alberta, Canada,
8. Poloclinico S. Orsola, Bologna, Italy,
9. 1. Medizinische Abteilung, Hanusch‐Krankenhaus, Vienna, Austria,
10. Gastroenterology Department, Hospital Severe Ochoa, Madrid, Spain,
11. University of Athens Medical School, Greece,
12. Hopital Pellegrin, Bordeaux, France