1. Division of Geriatrics, Gerontology, and Palliative Care, UC San Diego School of Medicine, University of California, San Diego
2. Cardiovascular Medicine Section, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina
3. Section on Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina
4. Department of Health and Exercise Science at Wake Forest University, Winston-Salem, North Carolina
5. Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina
6. Oroboros Instruments, Innsbruck, Austria