1. Division of Substance Abuse, Department of Psychiatry, Yale University School of Medicine,
West Haven, CT, USA
2. School of Social Work, University of Washington and Evergreen Treatment Services,
Seattle, WA, USA
3. Calhoun Cardiology Center, University of Connecticut School of Medicine,
West Hartford, CT, USA
4. Behavioral Pharmacology Research Unit, Johns Hopkins University School of Medicine,
Baltimore, MD, USA
5. Division of Alcohol and Drug Abuse, McLean Hospital,
Belmont, MA, USA
6. Department of Psychiatry, Harvard Medical School,
Boston, MA, USA