Affiliation: | 1. Senior Research Public Health Analyst, Substance Abuse Treatment Evaluations and Interventions Program, RTI International , Research Triangle Park , NC , USA zule@rti.org;3. Research Analyst, Substance Abuse Treatment Evaluations and Interventions Program, RTI International , Research Triangle Park , NC , USA;4. Public Health Research Analyst, Substance Abuse Treatment Evaluations and Interventions Program, RTI International , Research Triangle Park , NC , USA;5. Senior Behavioral Scientist, US Centers for Disease Control and Prevention , Research Triangle Park , NC , USA;6. Behavioral Scientist, US Centers for Disease Control and Prevention , Research Triangle Park , NC , USA;7. Senior Program Director, Substance Abuse Treatment Evaluations and Interventions Program, RTI International , Research Triangle Park , NC , USA |