1. Grady College of Journalism and Mass Communication, University of Georgia, Athens, Georgia, USA
2. Department of Communication, Michigan State University, East Lansing, Michigan, USA
3. Department of Communication, University of Arkansas, Fayetteville, Arkansas, USA
4. Department of Communication, Cornell University, Ithaca, New York, USA
5. Ann S. Bowers College of Computing and Information Science, Cornell University, Ithaca, New York, USA
6. Annenberg School for Communication and Journalism, University of Southern California, Los Angeles, California, USA