1. Department of Medicine, Section of General Internal Medicine, Boston Medical Center, Clinical Addiction Research and Education (CARE) Unit, Boston, MA, USA
2. Vanderbilt Center for Clinical Cardiovascular Trials Evaluation (V-C3REATE), Vanderbilt University Medical Center, Nashville, TN, USA
3. First Pavlov State Medical University of St. Petersburg, St. Petersburg, Russian Federation
4. Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
5. Data Coordinating Center, Boston University School of Public Health, Boston, MA, USA
6. Research Institute of Influenza, St. Petersburg, Russian Federation
7. Department of Medicine, Division of General Internal Medicine, University of Pittsburgh, Pittsburgh, PA, USA
8. St. Petersburg Bekhterev Research Psychoneurological Institute, St. Petersburg, Russian Federation
9. Department of Medicine, Section of General Internal Medicine, School of Medicine/Boston Medical Center, Clinical Addiction Research and Education (CARE) Unit, Boston University, Boston, MA, USA
10. Department of Community Health Sciences, Boston University School of Public Health, Boston, MA, USA