1. Department of Biomedical Engineering, Faculty of Medicine, University of Basel, Allschwil, Switzerland
2. Clarunis, Department of Visceral Surgery, University Center for Gastrointestinal and Liver Diseases, St. Clara Hospital and University Hospital, Basel, Switzerland
3. Faculty of Medicine, University of Erlangen, Erlangen, Germany
4. Department of Surgery, University of Nevada, Las Vegas, USA
5. Department of Surgery, East Carolina University Brody School of Medicine, Greenville, NC, USA