1. Departments of Social Medicine,
2. Pediatrics, and
3. UNC Injury Prevention Research Center, Chapel Hill, North Carolina;
4. Biostatistics, University of North Carolina, Chapel Hill, North Carolina;
5. Department of Community Medicine, Suez Canal University Faculty of Medicine, Ismailia, Egypt;
6. Department of Pediatrics, Government Medical College, Nagpur, India;
7. Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, Brazil;
8. Universidade Presbiteriana Mackenzie, São Paulo, Brazil;
9. Department of Clinical Epidemiology, College of Medicine, University of the Philippines, Manila, Philippines; and
10. Facultad de Medicina and
11. Departamento de Psicologia, Universidad de la Frontera, Temuco, Chile