1. Department of Surgery; Division of Minimally Invasive Surgery; Center for the Future of Surgery; University of California; San Diego USA
2. Department of General Surgery; University of Cologne; Cologne Germany
3. Department of Surgery; University of California; San Diego USA
4. Department of Surgery; Massachusetts General Hospital; Harvard Medical School; Boston USA
5. Department of Surgery; Division of Surgical Oncology; University of California; San Diego USA