1. Department of Psychology, University of Maryland, College Park, MD, USA;
2. Alcohol Tobacco and Other Drug Abuse Research Unit, South African Medical Research Council, Tygerberg, South Africa;
3. Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa;
4. Department of Psychology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA;
5. RTI International, Research Triangle Park, North Carolina, USA;
6. Health, Policy and Administration, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA;
7. Department of Psychology, North Carolina State University, Raleigh, North Carolina, USA;
8. Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, North Carolina, USA