1. Department of Emergency Medicine, Brigham and Women’s Hospital , Boston, Massachusetts , USA
2. Department of Emergency Medicine, Harvard Medical School , Boston, Massachusetts , USA
3. School of Medicine, University of Texas Southwestern Medical Center , Dallas, Texas , USA
4. Department of Neurology, Brigham and Women’s Hospital , Boston, Massachusetts , USA
5. Center for Alzheimer Research and Treatment, Brigham and Women’s Hospital , Boston, Massachusetts , USA
6. Division of Circadian and Sleep Disorders, Departments of Medicine and Neurology, Brigham and Women’s Hospital , Boston, Massachusetts , USA
7. Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute , Boston, Massachusetts , USA
8. Division of Palliative Medicine, Department of Medicine, Brigham and Women’s Hospital , Boston, Massachusetts , USA
9. Department of Medicine, Beth Israel Deaconess Medical Center , Boston, Massachusetts , USA