1. Hussman School of Journalism and Media, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
2. Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
3. Center for Health Communication, The University of Texas at Austin, Austin, TX, USA
4. Reuters Institute for the Study of Journalism, University of Oxford, Oxford, UK
5. Oxford Internet Institute, University of Oxford, Oxford, UK
6. Stan Richards School of Advertising and Public Relations, The University of Texas at Austin, Austn, TX, USA