1. Centers for Disease Control and Prevention, Atlanta, GA, USA
2. Pennsylvania Department of Health, Harrisburg, Pennsylvania, USA
3. Montgomery County Department of Health, Norristown, Pennsylvania, USA
4. Bucks County Department of Health, Doylestown, Pennsylvania, USA
5. Gloucester County Health Department, Turnersville, New Jersey, USA
6. New Jersey State Department of Health and Senior Services, Trenton, New Jersey, USA
7. University of Pennsylvania, Philadelphia, Pennsylvania, USA
8. U.S. Food and Drug Administration, Washington, D.C., USA