1. Department of Prevention and Community Health, Milken Institute School of Public Health, George Washington University, Washington D.C., USA
2. Charles H. Sandage Department of Advertising, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
3. School of Journalism and Media Studies, San Diego State University, San Diego, California, USA
4. S. I. Newhouse School of Public Communications, Syracuse University, Syracuse, New York, USA
5. Public Health Research Analyst, RTI International, Washington D.C., USA
6. Department of Communication, University of Maryland, College Park, Maryland, USA