1. Annenberg School for Communication, University of Pennsylvania , Philadelphia, PA , USA
2. Leonard Davis Institute of Health Economics, University of Pennsylvania , Philadelphia, PA , USA
3. Abramson Cancer Center, Tobacco and Environmental Carcinogenesis Program , Philadelphia, PA , USA
4. Dana-Farber Cancer Institute, Survey and Qualitative Methods Core , Boston, MA , USA
5. Harvard University, TH Chan School of Public Health, Department of Social and Behavioral Sciences , Boston, MA , USA
6. Division of Adolescent Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford , CA , USA
7. Harvard Medical School , Boston, MA , USA
8. MassGeneral Hospital, Division of General Academic Pediatrics , Boston, MA , USA
9. MGH Tobacco Research and Treatment Center , Boston, MA , USA
10. American Academy of Pediatrics Julius B. Richmond Center , Itasca, IL , USA
11. Public Health Advocacy Institute, Northeastern University , Boston, MA , USA