1. Department of Psychiatry and Behavioral Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.
2. Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.
3. Veterans Affairs Medical Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.
4. Department of Cardiology, Kaleida, Millard Fillmore Division, Buffalo, New York, and Department of Psychology, University of Oklahoma, Norman, Oklahoma.
5. Center for the Study of Human Operator Performance, University of Oklahoma, Norman, Oklahoma.
6. From the Department of Medicine and Program in Health Disparities Research, University of Minnesota, Minneapolis, Minnesota.