1. Department of Psychiatry Section Medical Psychology and Psychotherapy, Erasmus University Medical Center Rotterdam The Netherlands
2. Department of Surgery Erasmus Cancer Institute, Erasmus University Medical Center Rotterdam The Netherlands
3. Department of Surgery Maasstad Hospital Rotterdam The Netherlands
4. Department of Surgery Reinier de Graaf Hospital Delft The Netherlands
5. Department of Surgery Leiden University Medical Center Leiden The Netherlands
6. Department of surgery Elisabeth Tweesteden Hospital Tilburg The Netherlands
7. Department of Surgery Catharina Hospital Eindhoven The Netherlands
8. Department of Surgery Radboud University Medical Center Nijmegen The Netherlands
9. Department of Primary and Community Care Radboud University Medical Center Nijmegen The Netherlands