1. Department of Surgery Amsterdam UMC University of Amsterdam Amsterdam The Netherlands
2. Scientific bureau of the Dutch Institute of Clinical Auditing Leiden The Netherlands
3. Department of Molecular Medicine and Surgery Karolinska Institutet, Stockholm Sweden
4. Department of Gastroenterology and Hepatology Amsterdam UMC University of Amsterdam Amsterdam The Netherlands
5. Department of Surgery Reinier de Graaf Hospital, Delft The Netherlands
6. Department of Surgical Oncology Netherlands Cancer Institute–Antoni van Leeuwenhoek Hospital Amsterdam The Netherlands
7. Department of Surgery Tergooi Hospital, Hilversum The Netherlands
8. Department of Colorectal Surgery Haaglanden Medical Center The Hague The Netherlands