1. Department of Surgical Oncology, Erasmus MC Cancer Institute, University Medical Centre Rotterdam, Rotterdam, The Netherlands
2. Department of Surgical Oncology, Netherlands Cancer Institute – Antoni van Leeuwenhoek, Amsterdam, The Netherlands
3. Department of Surgical Oncology, University Medical Centre Groningen, Groningen University, Groningen, The Netherlands
4. Department of Surgical Oncology, Radboud University Medical Centre, Nijmegen, The Netherlands