1. Division of Geriatric Medicine, UT Southwestern Medical Center, Dallas, TX, USA
2. Harold C. Simmons Comprehensive Cancer Center, UT Southwestern Medical Center, Dallas, TX, USA
3. City University of New York School of Medicine, New York, NY, USA
4. Department of Radiation Oncology, UT Southwestern Medical Center, Dallas, TX, USA
5. Division of General Internal Medicine, UT Southwestern Medical Center, Dallas, TX, USA
6. VA Portland Health Care System, Portland, OR, USA
7. Department of Population and Data Sciences, UT Southwestern Medical Center, Dallas, TX, USA