[1] RTI International (Research Triangle Institute),Substance Abuse Treatment Evaluations and Interventions Research Program
[2] Duke University School of Medicine,Department of Psychiatry and Behavioral Sciences
[3] Duke Clinical Research Institute,Gillings School of Global Public Health
[4] The University of North Carolina at Chapel Hill,Alcohol and Drug Abuse Research Unit
[5] Medical Research Council,Department of Psychiatry
[6] Stellenbosch University,undefined