| Affiliation: | 1. Department of Community Health Sciences, Boston University School of Public Health, Boston, MA, USA;2. Department of Economics and Institute for Health Research and Policy, University of Illinois, Chicago, IL, USA;3. Section of General Internal Medicine, Boston Medical Center, Boston, MA, USA;4. Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA;5. Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, MN, USA |
