1. Department of Acute and Tertiary Care, School of Nursing, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
2. Center for Research on Health Care Data Center, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
3. Department of Health Policy and Management, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
4. Division of General lnternal Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
5. Division of Hematology/Oncology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
6. Harry J. Duffey Family Professor of Palliative Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA.
7. Department of Critical Care Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.