1 Geriatrics Division, School of Medicine, University of Utah, Salt Lake City, Utah.
2 Veterans Affairs Geriatric Research, Education, and Clinical Center, Salt Lake City, Salt Lake City, Utah.
3 Division of Public Health Sciences, Department of Biostatistical Sciences, Wake Forest School of Medicine, Wake Forest University, Winston-Salem, North Carolina.
4 Section on Geriatric Medicine, Department of Internal Medicine, Wake Forest School of Medicine, Wake Forest University, Winston-Salem, North Carolina.
5 Sticht Center on Healthy Aging and Alzheimer's Prevention, Wake Forest School of Medicine, Wake Forest University, Winston-Salem, North Carolina.