1 VISN 16 Geriatric Research Education and Clinical Center, Central Arkansas Veterans Healthcare System, Little Rock, Arkansas.
2 Department of Geriatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas.
3 Corresponding author: Kalpana P. Padala, MD, MS, Donald W. Reynold Department of Geriatrics, University of Arkansas for Medical Sciences, 2200 Fort Roots Drive (3J), North Little Rock, Arkansas 72114 (KPPadala@uams.edu).
4 Department of Psychiatry, University of Arkansas for Medical Sciences, Little Rock, Arkansas.
5 Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, Arkansas.
6 Research and Development, Central Arkansas Veterans Healthcare System, Little Rock, Arkansas.