1. Assistant Professor, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, USA
2. Research Analyst, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, USA
3. Instructor, Department of Family Medicine and Community Health, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA
4. Assistant Professor, Department of Family Medicine, Tufts University School of Medicine, Boston, Massachusetts, USA
5. Faculty, Greater Lawrence Family Health Center, Lawrence, Massachusetts, USA
6. Professor, Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, USA