1. University Hospital of Psychiatry II, Medical University of Innsbruck, Innsbruck, Austria.
2. Division of Psychosocial Research and Epidemiology, The Netherlands Cancer Institute, Amsterdam, The Netherlands.
3. Oncology Departments, Complejo Hospitalario of Navarre, Pamplona, Spain.
4. Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy.
5. Health Outcomes Research Unit, Italian Group for Adult Hematologic Diseases (GIMEMA) Data Center, Rome, Italy.
6. The Palliative Care Research Unit, Department of Geriatrics and Palliative Medicine GP, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark.
7. Department of Public Health, University of Copenhagen, Copenhagen, Denmark.
8. Department of Psychosomatic Medicine and Psychotherapy, Simssee Clinic Bad Endorf, Bad Endorf, Germany.
9. Department of Gastroenterology and Hepatology, Hampshire Hospitals NHS Foundation Trust, Basingstoke, United Kingdom.
10. Faculty of Medicine and Health Sciences, Andrzej Frycz Modrzewski Krakow University, Krakow, Poland.
11. Scanmed St. Raphael Hospital, Krakow, Poland.
12. Lynda Jackson Macmillan Centre, East and North Hertfordshire NHS Trust Incorporating Mount Vernon Cancer Centre, Northwood, United Kingdom.