1. Duke University School of Medicine, Durham, NC, USA
2. University of Pittsburgh, Pittsburgh, PA, USA
3. Colorado School of Public Health, Arora, CO, USA
4. Four Seasons Compassion for Life, Hendersonville, NC, USA
5. Division of Geriatric Medicine & Palliative Care Program, University of North Carolina, Chapel Hill, NC, USA
6. University of Colorado, Denver, CO, USA