1. Department of Vascular Surgery, Klinikum Westmunsterland GmbH, Bocholt, Germany
2. Faculty of Medicine, KULeuven, Leuven, Belgium
3. Department of Surgery, AZ Groeninge, Kortrijk, Belgium
4. Department of Gastroenterology, AZ Groeninge, Kortrijk, Belgium
5. Department of Gastroenterology, OLV van Lourdes Hospital, Waregem, Belgium
6. Department of Pathological Anatomy, AZ Groeninge, Kortrijk, Belgium
7. Department of Gastroenterology and Hepatology, University Hospitals Leuven, UZ Leuven, Leuven, Belgium