1. Department of Medicine, University of Michigan, Ann Arbor, MI, USA
2. Department of Medicine, VA Ann Arbor Healthcare System, Ann Arbor, MI, USA
3. Department of Family Medicine, University of Michigan, Ann Arbor, MI, USA
4. Department of Medicine, Mayo Clinic, Rochester, MN, USA
5. Division of Primary Care Internal Medicine, Mayo Clinic, Rochester, MN, USA
6. Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery and Bioethics Research Program, Mayo Clinic, Rochester, MN, USA
7. Department of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
8. Section of Palliative Care, Birmingham VA Medical Center, Birmingham, AL, USA