1. University of Arizona College of Medicine, Tucson, Arizona.
2. Department of Emergency Medicine, University of Arizona College of Medicine, Tucson, Arizona.
3. Division of Geriatrics, General Internal Medicine and Palliative Medicine, Department of Medicine, University of Arizona College of Medicine, Tucson, Arizona.
4. Arizona Center on Aging, University of Arizona College of Medicine, Tucson, Arizona.
5. Arizona Health Sciences Library, University of Arizona College of Medicine, Tucson, Arizona.