[1
]Division of Unintentional Injury Prevention, National Center for Injury Prevention
and Control, Centers for Disease Control and Prevention, Atlanta, Georgia
[2
]Division of Toxicology and Human Health Sciences, Agency for Toxic Substances and
Disease Registry, Atlanta, Georgia
[3
]Division of Public Health Information and Dissemination, Center for Surveillance,
Epidemiology, and Laboratory Sciences, Centers for Disease Control and Prevention,
Atlanta, Georgia