1. Department of Psycho Oncology, Leiden University Medical Center (LUMC), RC Leiden, the Netherlands
2. Department of Psychiatry, Leiden University Medical Center (LUMC), ZA Leiden, the Netherlands
3. Department of Surgery, Leiden University Medical Center (LUMC), ZA Leiden, the Netherlands
4. Department of Child and Adolescent Psychiatry, Amsterdam University Medical Centre, Amsterdam, the Netherlands
5. Methodology of Educational Sciences, Leuven, Belgium
6. Department of Medical Oncology, Leiden University Medical Center (LUMC), Leiden, the Netherlands