1. Marie Curie Palliative Care Research Department, Division of Psychiatry, University College London, London, UK
2. Primary Care and Population Health, Institute of Epidemiology and Health Care, University College London, London, UK
3. Palliative Care Unit, Department of Oncology, Hematology and BMT, and Pneumology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
4. Interdisciplinary Palliative Care Unit, Department of Hematology, Oncology, and Pneumology, University Medical Center, Mainz, Germany
5. Anesthesiology, Pain and Palliative Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
6. University Center for Palliative Care, Inselspital University Hospital Bern, University of Bern, Bern, Switzerland
7. Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
8. Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, UK
9. Department Family Medicine and Population Health (FamPop), Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
10. Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna & Academy of the Sciences of Palliative Medicine, Bologna, Italy
11. Department of Psychology, University of Bologna, Bologna, Italy