1. Department of Radiation Oncology, Cancer Centre Amsterdam, Academic Medical Centre, Amsterdam, The Netherlands
2. Department of Surgery, Cancer Centre Amsterdam, Academic Medical Centre, Amsterdam, The Netherlands
3. Department of Medical Oncology, Cancer Centre Amsterdam, Academic Medical Centre, Amsterdam, The Netherlands
4. Medical Library, Academic Medical Centre, Amsterdam, The Netherlands
5. Department of Surgery, Erasmus Medical Centre, Erasmus University Rotterdam, Rotterdam, The Netherlands