1. Department of General, Visceral and Transplantation SurgeryRWTH Aachen UniversityAachen Germany
2. Department of General SurgeryMaastricht University Medical CentreMaastricht The Netherlands
3. Institut fuer Textiltechnik at RWTH Aachen UniversityAachen Germany
4. Department of Rehabilitation & Prevention Engineering, Institute of Applied Medical EngineeringRWTH Aachen UniversityAachen Germany