[1] NIDA, Div Epidemiol Serv & Prevent Res, NIH, Bethesda, MD 20892 USA
[2] Univ Calif Los Angeles, Dept Psychiat & Biobehav Sci, UCLA Integrated Subst Abuse Programs, Los Angeles, CA 90024 USA
[3] Friends Res Inst, Baltimore, MD USA
[4] Univ New Mexico, Ctr Alcoholism Subst Abuse & Addict, Albuquerque, NM 87131 USA
[5] RTI Int, Res Triangle Pk, NC USA
[6] Univ Miami, Miller Sch Med, Miami, FL 33136 USA
[7] NYU, Sch Med, Dept Populat Hlth, New York, NY 10003 USA
[8] NYU, Sch Med, Dept Psychiat, New York, NY 10003 USA
[9] Univ Maryland, College Pk, MD 20742 USA