1. Department of Surgery; Leiden University Medical Center; Leiden The Netherlands
2. Department of Gerontology and Geriatrics; Leiden University Medical Center; Leiden The Netherlands
3. Division of Psychosocial Research and Epidemiology; Netherlands Cancer Institute; Amsterdam The Netherlands
4. Department of Medical Oncology; Leiden University Medical Center; Leiden The Netherlands
5. Department of Medical Psychology, Academic Medical Center; University of Amsterdam; Amsterdam The Netherlands