1. Center for Research on Media, Technology, and Health, Division of General Internal Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA.
2. Center for Research on Media, Technology, and Health, Division of General Internal Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA
3. Departments of Psychiatry, Psychology, Epidemiology, and Biostatistics, University of Pittsburgh, Pittsburgh, PA
4. Center for Research on Media, Technology, and Health, University Honors College, Division of Adolescent Medicine, Department of Pediatrics, Division of General Internal Medicine, Department of Medicine, University of Pittsburgh
School of Medicine, University of Pittsburgh, Pittsburgh, PA