1. Democracy Research Unit, Political Science, College of Law and Public Administration, University of Salamanca, Salamanca, Spain
2. Department of Communication, Carlos III University, Getafe, Spain
3. Media Effects Research Lab, Film Production & Media Studies Department, Donald P. Bellisario College of Communications, Pennsylvania State University, State College, PA, USA
4. Facultad de Comunicación y Letras, Universidad Diego Portales, Santiago, Chile