1. Department of Palliative Care, Policy and Rehabilitation, King's College London, Cicely Saunders Institute, London, United Kingdom of Great Britain and Northern Ireland.
2. Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston, Massachusetts.
3. Division of Quality of Life and Palliative Care, Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee.