1 Department of Physical Medicine and Rehabilitation, College of Medicine, University of Florida, Gainesville, FL, USA.
2 Department of Anesthesiology, College of Medicine, University of Florida, Gainesville, FL, USA.
3 Divisions of Perioperative Medicine and Neuroanesthesia, Department of Anesthesiology, College of Medicine, University of Florida, Gainesville, FL, USA.
4 Alzheimer's Association, Chicago, IL, USA.
5 Department of Psychology, University of Florida, Gainesville, FL, USA.