1. Centers for Disease Control and Prevention, Atlanta, Georgia, USA
2. Centers for Disease Control and Prevention, Atlanta, Georgia, USAAtlanta Research and Education Foundation, Atlanta, Georgia, USA
3. Atlanta Research and Education Foundation, Atlanta, Georgia, USADepartment of Human Resources, Atlanta, Georgia, USA
4. Bureau of Community Environmental Health, Tallahassee, Florida, USA
5. Ohio Department of Health, Columbus, Ohio, USA
6. Department of Health, Minneapolis, Minnesota, USA
7. Maryland Department of Health and Mental Hygiene, Baltimore, Maryland, USA
8. New York State Department of Health, Troy, New York, USA