1. 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. Department of Neurology, Massachusetts General Hospital Cancer Center, Boston, Massachusetts, USA.
5. Department of Medicine, Massachusetts General Hospital Cancer Center, Boston, Massachusetts, USA.
6. Department of Psychiatry, Massachusetts General Hospital Cancer Center, Boston, Massachusetts, USA.