1Department of Gastroenterology and Gastrointestinal Oncology, Göttingen University Hospital, Göttingen, Germany
2Department of Gastroenterology, Nouvel Hôpital Civil, University Hospitals, Strasbourg, France
3Medicine Department, Exploration and Digestive Endoscopy Unit, Public Hospital Establishment Mohamed Boudiaf, El Khroub, Algeria
4Department of Surgery, Nouvel Hôpital Civil and IHU Strasbourg, University Hospitals, Strasbourg, France
5Hepatobiliary Unit, Ospedale Generale Regionale F. Miulli, Acquaviva delle Fonti, Italy
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