1. Department of Surgery, Amsterdam UMC location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
2. Treatment and Quality of Life, Cancer Center Amsterdam, Amsterdam, The Netherlands
3. Department of Surgery, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands
4. Dutch Institute for Clinical Auditing, Leiden, The Netherlands
5. Department of Surgery, Ikazia Hospital, Rotterdam, The Netherlands
6. Department of Surgical Oncology and Gastrointestinal Surgery, Erasmus MC, Rotterdam, the Netherlands.