1. Medical School, Mayo Clinic Alix School of Medicine, Rochester, MN, USA
2. Mayo Clinic Hospice, Mayo Clinic, Rochester, MN, USA
3. Department of Medicine, Mayo Clinic Division of Hospital Internal Medicine, Mayo Clinic, Rochester, MN, USA
4. Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN, USA
5. Division of Community Internal Medicine, Geriatrics and Palliative Care, Department of Medicine, Mayo Clinic, Rochester, MN, USA
6. Division of General Internal Medicine, Mayo Clinic, Rochester, MN, USA
7. Knight Cancer Institute, Oregon Health and Science University, Portland, Oregon, USA
8. Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA