1 Christopher R. Carpenter is with Washington University School of Medicine, Division of Emergency Medicine, St Louis, MO. Gila Neta is with Implementation Science, Division of Cancer Control and Population Sciences, National Cancer Institute, National Institutes of Health, Rockville, MD. Russell E. Glasgow is with Department of Family Medicine and Colorado Health Outcomes Research Program, University of Colorado, Denver. Borsika A. Rabin is with Department of Family Medicine, School of Medicine, University of Colorado, Denver, and CRN Cancer Communication Research Center, Institute for Health Research, Kaiser Permanente Colorado, Denver. Ross C. Brownson is with Prevention Research Center in St Louis, MO, and Brown School Washington University in St Louis, MO, and Division of Public Health Sciences, and Alvin J. Siteman Cancer Center, Washington University School of Medicine, St. Louis.