1. Center for Vital Longevity, University of Texas at Dallas, Dallas, TX, USA
2. School of Behavioral and Brain Sciences, University of Texas at Dallas, Richardson, TX, USA
3. Department of Psychology, King Saud University, Riyadh, Kingdom of Saudi Arabia
4. Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, USA
5. School of Psychology, University of East Anglia, Norwich, UK