Melissa J. Smiley - Center for Social Epidemiology and Population Health, School of Public Health, University of Michigan, 109 Observatory Street, 3rd Floor, Ann Arbor, MI 48109-2029, USA.
Ana V. Diez Roux - Center for Social Epidemiology and Population Health, School of Public Health, University of Michigan, 109 Observatory Street, 3rd Floor, Ann Arbor, MI 48109-2029, USA
Shannon J. Brines - Virginia Tech
Daniel G. Brown - Virginia Tech
Kelly R. Evenson - University of North Carolina at Chapel Hill
Daniel A. Rodriguez - University of North Carolina at Chapel Hill