1. Harborview Injury Prevention and Research Center University of Washington Seattle Washington USA
2. Department of Epidemiology University of Washington Seattle Washington USA
3. College of Medicine, Institute for Research and Education to Advance Community Health Washington State University Seattle Washington USA
4. Seattle Children's Hospital Seattle Washington USA
5. Department of Public Health University of Rochester Rochester New York USA
6. College of Natural Sciences University of Puerto Rico Rio Piedras Puerto Rico
7. Department of Biological Sciences University of Idaho Moscow Idaho USA
8. School of Public Health University of Michigan Ann Arbor Michigan USA
9. Department of Pediatrics University of Washington Seattle Washington USA