1. Division of Adult Palliative Care, Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.
2. Division of Palliative Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.
3. Harvard Medical School, Boston, Massachusetts, USA.
4. Division of Palliative Care and Geriatric Medicine, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA.