1. Center for Research on Media, Technology, and Health, University of Pittsburgh, Pittsburgh, Pennsylvania.
2. Division of General Internal Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.
3. Health Policy Institute, University of Pittsburgh, Pittsburgh, Pennsylvania.
4. Department of Communication Studies, West Virginia University, Morgantown, West Virginia.
5. Division of Adolescent Medicine, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.