1. Ovesco Endoscopy AG, Tuebingen, Germany;
2. Department of Gastroenterology and Oncology, Klinikum Ludwigsburg, Ludwigsburg, Germany;
3. Department of Gastroenterology and Hepatology, University Hospital, Zurich, Switzerland;
4. Medical Faculty, University of Tuebingen, Germany;
5. IHCI-Institute, Steinbeis University Berlin, Tuebingen, Germany