1. Department of Medicine, Section of General Internal Medicine, Boston Medical Center, Clinical Addiction Research and Education (CARE) Unit, Boston, MA, USA
2. Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
3. Lab of Clinical Pharmacology of Addictions, First Pavlov State Medical University of St. Petersburg, St. Petersburg, Russia
4. HIV/AIDS Research, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
5. Department of Addictions, V.M. Bekhterev National Medical Research Center for Psychiatry and Neurology, St. Petersburg, Russia
6. Department of Community Health Sciences, Boston University School of Public Health, Boston, MA, USA
7. Department of Medicine, Division of General Internal Medicine, University of Washington/Harborview Medical Center, Seattle, WA, USA