1. Department of Anesthesiology and Critical Care, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA.
2. University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
3. Division of Oncology, Department of Medicine, Johns Hopkins School of Medicine, Sibley Memorial Hospital, Washington, DC, USA.
4. Division of General Internal Medicine, Department of Medicine, University of Colorado School of Medicine, Anschutz Medical Campus, Aurora, Colorado; Department of Medicine, Department of Veterans Affairs, Eastern Colorado Health, Aurora, Colorado, USA.
5. Heart and Vascular Institute, Division of Cardiology, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
6. Center for Palliative and Supportive Care, School of Nursing and Department of Medicine, Division of Geriatrics, Gerontology, and Palliative Care, University of Alabama at Birmingham, Birmingham, Alabama, USA.
7. Division of Health System Innovation and Research, Department of Health Sciences, University of Utah Health Hospitals and Clinics, Salt Lake City, Utah, USA.
8. Section of Palliative Care and Medical Ethics, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.