1. Department of Research; Netherlands Comprehensive Cancer Organisation; Utrecht the Netherlands
2. Department of Health Technology and Services Research; MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente; Enschede the Netherlands
3. Department of Epidemiology; University of Groningen, University Medical Center Groningen; Groningen the Netherlands
4. Department of Surgical Oncology; Canisius Wilhelmina Hospital; Nijmegen the Netherlands
5. Department of Medical Oncology; Netherlands Cancer Institute; Amsterdam the Netherlands
6. Laboratory of Pathology; Dordrecht the Netherlands
7. Department of Surgical Oncology; Maastricht University Medical Centre; Maastricht the Netherlands
8. Department of Radiation Oncology; Institut Curie; Paris France