1. School of Social Work, University of Michigan, Ann Arbor, Michigan
2. Warren Wright Adolescent Center, Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, Illinois
3. Edward Hines Jr. Veterans Affairs Hospital, Research Service, Hines, Illinois
4. Department of Psychology, University of Michigan, Ann Arbor, Michigan
5. Department of Neuroscience, University of California–San Diego, La Jolla, California
6. United States Drug Testing Laboratories, Des Plaines, Illinois
7. Chemistry and Drug Metabolism, National Institute on Drug Abuse, Rockville, Maryland
8. University of Maryland School of Medicine, Baltimore, Maryland