1. Department of Internal Medicine; University of Utah; Salt Lake City UT USA
2. Adelaide Medical School; Discipline of Physiology; The University of Adelaide; Australia
3. Geriatric Research, Education, and Clinical Center; VAMC; Salt Lake City UT USA
4. Department of Nutrition and Integrative Physiology; University of Utah; Salt Lake City UT USA
5. Department of Anesthesiology; University of Utah; Salt Lake City UT USA
6. Department of Circulation and Medical Imaging; Faculty of Medicine; Norwegian University of Science and Technology; Trondheim Norway
7. Centre for Heart, Lung and Vascular Health; School of Health and Exercise Sciences; University of British Columbia; Kelowna British Columbia Canada