1. Department of Pathology Radboud University Medical Centre Nijmegen the Netherlands
2. Department of Gastroenterology and Hepatology Radboud University Medical Centre Nijmegen the Netherlands
3. Department of Surgery, Erasmus MC Cancer Institute Erasmus University Medical Centre Rotterdam Rotterdam the Netherlands
4. Department of Surgery Radboud University Medical Centre Nijmegen the Netherlands
5. Department of Radiotherapy Radboud University Medical Centre Nijmegen the Netherlands
6. Department of Pathology Canisius Wilhelmina Hospital Nijmegen the Netherlands
7. Department of Pathology, Erasmus MC Cancer Institute Erasmus University Medical Centre Rotterdam Rotterdam the Netherlands