1. University of Washington; Department of Pediatrics, Seattle Children's Research Institute; Center for Child Health, Behavior and Development; Seattle WA USA
2. Medical Student, University of California; San Diego School of Medicine; La Jolla CA USA
3. Health Scientist, Division of Unintentional Injury Prevention; National Center for Injury Prevention and Control; Centers for Disease Control and Prevention; Atlanta GA USA
4. Alpert Medical School of Brown University, Department of Family Medicine; Brown University Center for Primary Care and Prevention; Pawtucket RI USA
5. Research Scientist, Boston Children's Hospital; Center for Media and Child Health; Boston MA USA