1. Department of Palliative Medicine, Bispebjerg Hospital, Copenhagen, Denmark, Institute of Public Health, University of Copenhagen, Copenhagen, Denmark
2. Department of Palliative Medicine, Bispebjerg Hospital, Copenhagen, Denmark
3. Division of Psychosocial Research & Epidemiology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
4. Department of Oncology, Hospital of Navarre, Pamplona, Spain
5. Clinical Sciences at South Bristol, Bristol, UK, Department of Social Medicine, University of Bristol, Bristol, UK
6. Quality of Life Unit, EORTC Data Center, Brussels, Belgium
7. Department of Public Health, Aberdeen University Medical School, Aberdeen, UK, Unit of Applied Clinical Research, Norwegian University of Science and Technology, Trondheim, Norway
8. Department of Internal Medicine, University Medical Centre, Utrecht, The Netherlands
9. Department of Otolaryngology Head & Neck Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden
10. Unit of Applied Clinical Research, Norwegian University of Science and Technology, Trondheim, Norway
11. Department of Medical Psychology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
12. Qualitymetric Incorporated, Lincoln, RI, USA for the EORTC Quality of Life Group, National Institute of Occupational Health, Copenhagen, Denmark