1. Department of Community Health Sciences, Boston University School of Public Health, Boston, Massachusetts2Clinical Addiction Research and Education (CARE) Unit, Section of General Internal Medicine, Department of Medicine, Boston Medical Center and Boston
2. Department of Psychology, Boston University, Boston, Massachusetts
3. Clinical Addiction Research and Education (CARE) Unit, Section of General Internal Medicine, Department of Medicine, Boston Medical Center and Boston University School of Medicine, Boston, Massachusetts4Department of Biostatistics, Boston University Schoo
4. Clinical Addiction Research and Education (CARE) Unit, Section of General Internal Medicine, Department of Medicine, Boston Medical Center and Boston University School of Medicine, Boston, Massachusetts
5. Department of Community Health Sciences, Boston University School of Public Health, Boston, Massachusetts
6. Data Coordinating Center, Boston University School of Public Health, Boston, Massachusetts