1. Division of General Internal Medicine, Section of Palliative Care and Medical Ethics, University of Pittsburgh, Pittsburgh, Pennsylvania
2. Palliative Research Center, University of Pittsburgh, Pittsburgh, Pennsylvania
3. Division of General Internal Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
4. University of Pittsburgh School of Nursing, Pittsburgh, Pennsylvania
5. Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
6. Albert Einstein Cancer Center, Albert Einstein College of Medicine, New York, New York
7. Department of Clinical Epidemiology and Biostatistics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
8. Division of General Internal Medicine, Section of Palliative Medicine, Johns Hopkins University School of Medicine and Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
9. School of Nursing, UAB Center for Palliative and Supportive Care, University of Alabama at Birmingham, Birmingham