1. Department of Surgical Oncology, the Netherlands Cancer Institute Antoni van Leeuwenhoek Hospital Amsterdam The Netherlands
2. Department of Surgery St. Antonius Hospital Nieuwegein The Netherlands
3. Department of Gastrointestinal Oncology, the Netherlands Cancer Institute Antoni van Leeuwenhoek Hospital Amsterdam The Netherlands
4. Department of Biometrics, the Netherlands Cancer Institute Antoni van Leeuwenhoek Hospital Amsterdam The Netherlands
5. Department of Medical Oncology St. Antonius Hospital Nieuwegein The Netherlands
6. Department of Pathology, the Netherlands Cancer Institute Antoni van Leeuwenhoek Hospital Amsterdam The Netherlands