1 Robert Wood Johnson Clinical Scholars, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
2 Center for Public Health Initiatives, University of Pennsylvania, Philadelphia, PA, USA.
3 Department of City and Regional Planning, School of Design, University of Pennsylvania, Philadelphia, PA, USA.
4 Department of Family Medicine and Community Health, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. [email protected].