1. The Netherlands Comprehensive Cancer Organization, Utrecht, the Netherlands
2. Department of Medical and Clinical Psychology, CoRPS—Center of Research on Psychology in Somatic Diseases, Tilburg University, Tilburg, the Netherlands
3. Association for Palliative Care in the Netherlands, Utrecht, the Netherlands
4. Department of Internal Medicine, St. Jans Gasthuis, Weert, the Netherlands
5. Department of Pulmonology, Rijnstate, Arnhem, the Netherlands
6. Division of Psychosocial Research and Epidemiology, The Netherlands Cancer Institute, Amsterdam, the Netherlands