1. Department of Pediatrics, University of Arkansas for Medical Sciences, ArkansasUSA
2. Center for Applied Studies in Education, University of Arkansas at Little Rock, ArkansasUSA
3. Caliber Associates, VirginiaUSA
4. Center for Substance Abuse Treatment, Substance Abuse and Mental Health Services Administration, U.S. Department of Health and Human Services, Rockville, MarylandUSA