1. Amsterdam School of Communication Research (ASCoR), University of Amsterdam, Amsterdam, Netherlands;
2. Medill School of Journalism, Media, Integrated Marketing Communications, Northwestern University, Evanston, Illinois, USA;
3. Public Opinion Lab, Department of Advertising and Public Relations, University of Alabama, Tuscaloosa, Alabama, USA;
4. Annenberg School for Communication and Journalism, University of Southern California, Los Angeles, California, USA;
5. Computer Science and Engineering, University of Minnesota, Minneapolis, Minnesota, USA