1. ChildObesity180, Division of Nutrition Interventions, Communication, and Behavior Change, Friedman School of Nutrition Science and Policy, Tufts University, Boston, Massachusetts, USA.
2. Department of Library and Information Science, School of Computing and Information, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
3. Center for Social Dynamics and Community Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
4. Department of Behavioral and Community Health Sciences, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
5. Department of Pediatrics, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
6. Division of Adolescent and Young Adult Medicine, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA.