1. Department of Psychiatry University of Vermont Burlington VT USA
2. Division of Adolescent and School Health Centers for Disease Control and Prevention Atlanta GA USA
3. Department of Psychiatry and Biobehavioral Sciences University of California, Los Angeles Los Angeles CA USA
4. Department of Child and Adolescent Psychiatry Oregon Health and Science University Portland OR USA
5. Department of Neuroscience University of Rochester Medical Center Rochester NY USA
6. National Institute on Drug Abuse National Institutes of Health Bethesda MD USA
7. Department of Psychiatry University of Utah Salt Lake City UT USA