1. Department of Emergency Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA.
2. Department of Emergency, Harvard Medical School, Boston, Massachusetts, USA.
3. Division Palliative Care and Geriatric Medicine, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA.
4. Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA.
5. The Mongan Institute and the Division of Palliative Care and Geriatric Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA.