1. Division of Laboratory Services, Tennessee Department of Health, Nashville, TN 37216, USA
2. Public Health Laboratory, South Carolina Department of Public Health, Columbia, SC 29223, USA
3. Florida Bureau of Public Health Laboratories, Jacksonville, FL 32202, USA
4. Division of Family Health and Wellness, Tennessee Department of Health, Nashville, TN 37216, USA
5. Florida Newborn Screening Follow-Up Program, Tallahassee, FL 32301, USA