1. Department of Health Policy and Management, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
2. Department of Statistical Sciences, Duke University School of Medicine, Durham, North Carolina.
3. Department of Statistical Sciences, Duke University, Durham, North Carolina.
4. Hospice Analytics, Colorado Springs, Colorado.
5. Margolis Center for Health Policy, Duke University, Durham, North Carolina.
6. Sanford School of Public Policy, Duke University, Durham, North Carolina.