1. Department of Surgery, Franciscus Gasthuis & Vlietland, Rotterdam/Schiedam, The Netherlands;
2. Department of Surgery, Division of Surgical Oncology, Erasmus MC Cancer Institute, Rotterdam, The Netherlands;
3. Department of Surgery, Division of Surgical Oncology, Radboud University Medical Center, Nijmegen, The Netherlands;
4. Netherlands Comprehensive Cancer Organisation, Enschede, The Netherlands;
5. Department of Surgery, IJsselland Hospital, Capelle aan den IJssel, The Netherlands;
6. Department of Surgery, Haaglanden Medical Center, Den Haag, The Netherlands