1 Center for Health, Analytics, Media, and Policy, RTI International, 3040 East Cornwallis Rd, PO Box 12194, Research Triangle Park, NC 27709-2194 (msaunders@rti.org).
2 Center for Health, Analytics, Media, and Policy, RTI International, Research Triangle Park, North Carolina.
3 Department of Environmental and Occupational Health, Dornsife School of Public Health, Drexel University, Philadelphia, Pennsylvania.
4 Community Health and Implementation Research Program, RTI International, Research Triangle Park, North Carolina.
5 Department of Epidemiology and Biostatistics, University of California, San Francisco.
6 Department of Global Health, University of Washington, Seattle.