1. Division of Healthcare Quality Promotion, Centers for Disease Control and Prevention , Atlanta, Georgia, USA
2. Wisconsin State Laboratory of Hygiene , Madison, Wisconsin, USA
3. Maryland Department of Health , Baltimore, Maryland, USA
4. Goldbelt C6, LLC , Chesapeake, Virginia, USA
5. Minnesota Department of Health , St. Paul, Minnesota, USA
6. Washington State Department of Health , Shoreline, Washington, USA