1. Departments of Neurology and Palliative Care, University of California, Los Angeles, Los Angeles, California, USA.
2. Departments of Neurology and Supportive Care Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA.
3. Departments of Medicine and Neurology, Washington University in St. Louis, St. Louis, Missouri, USA.
4. Department of Speech Language Pathology, Cedars-Sinai Medical Center, Los Angeles, California, USA.
5. Palliative Care Program, Department of General Internal Medicine, Johns Hopkins Bayview Medical Center, Baltimore, Maryland, USA.
6. Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA.
7. Department of Neurology, Harborview Medical Center, University of Washington, Seattle, Washington, USA.
8. Departments of Neurology and Internal Medicine, Rush University Medical Center, Chicago, Illinois, USA.