1. Department of Anaesthesia and Intensive Care; Bispebjerg and Frederiksberg Hospital, University of Copenhagen; Copenhagen Denmark
2. Department of Anaesthesiology; The Abdominal Centre; Rigshospitalet, University of Copenhagen; Copenhagen Denmark
3. Biomedical Engineering, Department of Electrical Engineering; Technical University of Denmark; Lyngby Denmark
4. Digestive Disease Center; Bispebjerg and Frederiksberg Hospital, University of Copenhagen; Copenhagen Denmark
5. Department of Surgical Gastroenterology; The Abdominal Centre, Rigshospitalet, University of Copenhagen; Copenhagen Denmark