[1
]
Division of General Internal Medicine, Department of Medicine, University of Pittsburgh
School of Medicine, Pittsburgh, Pennsylvania.
[2
]
Center for Research on Media, Technology, and Health, University of Pittsburgh School
of Medicine, Pittsburgh, Pennsylvania.
[3
]
Division of Adolescent and Young Adult Medicine, Department of Pediatrics, University
of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.
[4
]
Children's Hospital of Pittsburgh of the University of Pittsburgh Medical Center,
Pittsburgh, PA.