1. Addiction Treatment and Research Program, Department of Psychiatry, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire.
2. Department of Veterans Affairs, Orlando VA Medical Center, Orlando, Florida.
3. Departments of Psychiatry and Neuroscience, Johns Hopkins School of Medicine, Baltimore, Maryland.
4. Departments of Psychiatry, Family Practice and Psychiatry, University of Vermont, Burlington, Vermont.
5. Department of Psychology, American University, Washington, District of Columbia.