1. a Joint Doctoral Program in Clinical Psychology, San Diego State University and University of California , San Diego , CA , USA
2. b Department of Psychiatry , University of California , San Diego , CA , USA
3. c School of Psychology, University of Western Australia , Crawley , WA , Australia
4. d HIV Neurobehavioral Research Center and Translational Methamphetamine AIDS Research Center , San Diego , CA , USA