1. Department of Psychology, The University of Alabama, Tuscaloosa, Alabama, USA;
2. Alabama Research Institute on Aging, The University of Alabama, Tuscaloosa, Alabama, USA;
3. College of Nursing, Florida State University, Tallahassee, Florida, USA;
4. VA Palo Alto Health Care System, War Related Illness & Injury Study Center, Palo Alto, California, USA;
5. College of Nursing, The University of Alabama, Tuscaloosa, Alabama, USA;
6. Department of Public Health Sciences, University of Miami, Miller School of Medicine, Miami, Florida, USA