1. Yuka Asada is with the School of Public Health, University of Illinois, Chicago. Rebecca Schermbeck and Kendall Thiede are with the Institute for Health Research and Policy, University of Illinois, Chicago. Jamie F. Chriqui is with the Division of Health Policy Research, Institute for Health Research and Policy, and Department of Health Policy and Administration, School of Public Health, University of Illinois, Chicago. Yuka Asada is also a Guest Editor for this supplement issue.