1. Centers for Disease Control and Prevention, National Center for Injury Prevention and Control, Division of Unintentional Injury, Atlanta, Georgia.
2. Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Division of Adult and Community Health, Atlanta, Georgia.
3. Rollins School of Public Health, Emory University, Atlanta, Georgia.
4. Department of Sociology & Anthropology, University of North Carolina at Charlotte, Charlotte, North Carolina.
5. Centers for Disease Control and Prevention, Public Health Practice Program Office, Atlanta, Georgia.