[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