1. Department of Digestive Diseases, CHU Pontchaillou, 2 rue H Guilloux, 35000 Rennes
2. Department of Digestive and Metabolic Surgery, CHU Amiens, 354 Boulevard de Beauville, 80000 Amiens.
3. Pôle Digestif, Digestive Endoscopy, Hôpital Archet 2, 151 route de Saint Antoine de Ginestière, BP 3079, 06202 Nice, Cedex 3.
4. Department of Hepato-Gastroenterology and Digestive Oncology, Hôpital Trousseau, Tours University Hospital, 37044 TOURS Cedex 09.
5. Hepato-Gastroenterology, Hôpital de la Timone, 264 rue St Pierre, 13385 Marseille.
6. Department of Digestive and Hepato-biliary-pancreatic Surgery, Groupe Hospitalier Pitié Salpêtrière, 75013 Paris.