1. Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA.
2. Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, North Carolina, USA.
3. Department of Veterans Affairs, Durham Veterans Affairs Medical Center, Durham, North Carolina, USA.
4. Division of Geriatrics and Palliative Medicine, Weill Cornell Medicine, New York, New York, USA.
5. Department of Medicine, Division of Palliative Medicine, University of California San Francisco, San Francisco, California, USA.
6. Department of Psychiatry, Division of Palliative Medicine, University of California San Francisco, San Francisco, California, USA.
7. Department of Medicine, Division of Palliative Medicine, School of Medicine, MedStar Health, Georgetown University, Baltimore, Maryland, USA.
8. Section of Palliative Care, Department of Medicine, School of Medicine, Stanford University, Palo Alto, California, USA.
9. Department of Psychiatry and Behavioral Sciences, Memorial Sloan Kettering Cancer Center, New York, New York, USA.
10. Section of Palliative Care, Division of Hematology and Medical Oncology, Knight Cancer Institute, Oregon Health and Science University, Portland, Oregon, USA.