<affiliation wicri:level="2"><nlm:affiliation>aClinical Addiction Research and Education (CARE) Unit, Section of General Internal Medicine, Boston Medical Center and Boston University School of Medicine bDepartment of Biostatistics cData Coordinating Center, Boston University School of Public Health, Boston, Massachusetts dDepartment of Epidemiology, University of Pittsburgh Graduate School of Public Health eDivision of General Internal Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania fDepartment of Epidemiology gDepartment of Community Health Sciences, Boston University School of Public Health, Boston, Massachusetts, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>aClinical Addiction Research and Education (CARE) Unit, Section of General Internal Medicine, Boston Medical Center and Boston University School of Medicine bDepartment of Biostatistics cData Coordinating Center, Boston University School of Public Health, Boston, Massachusetts dDepartment of Epidemiology, University of Pittsburgh Graduate School of Public Health eDivision of General Internal Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania fDepartment of Epidemiology gDepartment of Community Health Sciences, Boston University School of Public Health, Boston, Massachusetts</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>