1 Department of Gastroenterology and Digestive Endoscopy, Forli-Cesena Hospitals, AUSL Romagna, Italy.
2 Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Göttingen, Göttingen, Germany.
3 Department of Gastroenterology and Gastrointestinal Oncology, Hôpital Cochin, Assistance Publique-Hôpitaux de Paris and University of Paris, Paris, France.
4 Department of General, Visceral and Pediatric Surgery, University Medical Center Göttingen, Göttingen, Germany.
5 Department of Digestive Surgery, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris and University of Paris, Paris, France.
6 Department of Gastroenterology, Hôpital Saint-Antoine, Assistance Publique-Hôpitaux de Paris and Sorbonne University, Paris, France.
7 Department of Gastroenterology, Hôpital Nord, Assistance Publique des Hôpitaux de Marseille, Aix-Marseille University, Marseille, France.
8 Department of Endoscopy and Gastroenterology, Dupuytren University Hospital, Limoges, France.
9 Department of Gastroenterology, Poitiers University Hospital, Poitiers, France.
10 Department of Medical Statistics, University Medical Center, University of Göttingen, Göttingen, Germany.
11 Institute for Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany.
12 Department of Gastroenterology, Internal Medicine and Geriatrics, Rems-Murr Hospital, Winnenden, Germany.
13 Department of Gastroenterology, Gastrointestinal Oncology and Interventional Endoscopy, Sana Klinikum Offenbach, Offenbach, Germany.