1. Massachusetts General Hospital for Children, Division of General Academic Pediatrics, Boston, MA, USA
2. Massachusetts General Hospital, Tobacco Research and Treatment Center, Boston, MA, USA
3. Harvard Medical School, Boston, MA, USA
4. American Academy of Pediatrics, Julius B. Richmond Center of Excellence, Itasca, IL, USA
5. Department of Pediatrics, University of Illinois at Chicago, Chicago, IL, USA
6. Massachusetts General Hospital, Mongan Institute Health Policy Center, Boston, MA, USA
7. University of Rochester Medical Center, Department of Public Health Sciences, Rochester, NY, USA